📘 Chapter 1: Knowing Our Numbers
1. What is the place value of 5 in 45,678?
Answer: 5,000
Explanation: 5 is in thousands place → 5 × 1000
2. Write 7,89,456 in expanded form.
Answer: 7,00,000 + 80,000 + 9,000 + 400 + 50 + 6
Explanation: Break number according to place values
3. Which is greater: 56,789 or 65,789?
Answer: 65,789
Explanation: Compare leftmost digit → 6 > 5
4. Write the successor of 99,999.
Answer: 1,00,000
Explanation: Successor = number + 1
5. Write the predecessor of 1,00,000.
Answer: 99,999
Explanation: Predecessor = number − 1
6. Arrange in ascending order: 45,678; 12,345; 67,890
Answer: 12,345 < 45,678 < 67,890
Explanation: Smallest to largest
7. Arrange in descending order: 23,456; 54,321; 12,345
Answer: 54,321 > 23,456 > 12,345
Explanation: Largest to smallest
8. What is the smallest 5-digit number?
Answer: 10,000
Explanation: First 5-digit number
9. What is the greatest 4-digit number?
Answer: 9,999
Explanation: Highest 4-digit number
10. Write 5000 + 600 + 70 + 2 in standard form.
Answer: 5,672
Explanation: Add all values
11. What is the place value of 9 in 9,87,654?
Answer: 9,00,000
Explanation: 9 is in lakh place
12. Write the number name of 45,678.
Answer: Forty-five thousand six hundred seventy-eight
Explanation: Write in words
13. Compare: 34,567 ___ 34,657
Answer: 34,567 < 34,657
Explanation: Compare digits from left
14. How many digits are in 7,89,456?
Answer: 6 digits
Explanation: Count digits
15. Write the number just after 1,09,999.
Answer: 1,10,000
Explanation: Add 1
16. Write the number just before 10,000.
Answer: 9,999
Explanation: Subtract 1
17. Which number is larger: 8,76,543 or 8,67,543?
Answer: 8,76,543
Explanation: Compare second digit → 7 > 6
18. Write in expanded form: 3,45,210
Answer: 3,00,000 + 40,000 + 5,000 + 200 + 10
Explanation: Break into place values
19. What is the difference between 50,000 and 25,000?
Answer: 25,000
Explanation: 50,000 − 25,000
20. Write the largest 3-digit number.
Answer: 999
Explanation: Highest 3-digit number
📘 Chapter 2: Whole Numbers
Q1. What are whole numbers?
Ans. Whole numbers are natural numbers including 0 (0,1,2,3,...). Explanation: They start from 0 and go to infinity.
Q2. What is the successor of 999?
Ans. 1000. Explanation: Successor means next number → add 1.
Q3. What is the predecessor of 1000?
Ans. 999. Explanation: Predecessor means previous number → subtract 1.
Q4. Is 0 a whole number?
Ans. Yes. Explanation: Whole numbers include 0.
Q5. What is the smallest whole number?
Ans. 0. Explanation: Whole numbers start from 0.
Q6. Write first five whole numbers.
Ans. 0, 1, 2, 3, 4. Explanation: Sequence starts from 0.
Q7. What is closure property of addition?
Ans. Sum of two whole numbers is always a whole number. Explanation: Example: 2 + 3 = 5.
Q8. What is closure property of multiplication?
Ans. Product of two whole numbers is always a whole number. Explanation: Example: 4 × 5 = 20.
Q9. What is commutative property of addition?
Ans. a + b = b + a. Explanation: Order does not matter (2+3=3+2).
Q10. What is commutative property of multiplication?
Ans. a × b = b × a. Explanation: Order does not matter.
Q11. What is associative property of addition?
Ans. (a + b) + c = a + (b + c). Explanation: Grouping does not matter.
Q12. What is associative property of multiplication?
Ans. (a × b) × c = a × (b × c). Explanation: Grouping does not matter.
Q13. What is identity element for addition?
Ans. 0. Explanation: a + 0 = a.
Q14. What is identity element for multiplication?
Ans. 1. Explanation: a × 1 = a.
Q15. What is distributive property?
Ans. a × (b + c) = (a × b) + (a × c). Explanation: Multiply separately.
Q16. Find: 25 + 0
Ans. 25. Explanation: Adding 0 does not change number.
Q17. Find: 45 × 1
Ans. 45. Explanation: Multiplying by 1 does not change number.
Q18. Find: 6 × (2 + 3)
Ans. 30. Explanation: 6 × 5 = 30.
Q19. Find: (4 × 5) × 2
Ans. 40. Explanation: 20 × 2 = 40.
Q20. Is subtraction closed for whole numbers?
Ans. No. Explanation: Example: 3 − 5 = −2 (not a whole number).
📘 Chapter 3: Playing with Numbers
Q1. What are factors?
Ans. Factors are numbers that divide a number exactly. Explanation: Example: Factors of 6 → 1,2,3,6.
Q2. What are multiples?
Ans. Multiples are numbers obtained by multiplying a number. Explanation: Example: Multiples of 3 → 3,6,9,12.
Q3. What is a prime number?
Ans. A number having only two factors (1 and itself). Explanation: Example: 7.
Q4. What is a composite number?
Ans. A number having more than two factors. Explanation: Example: 8.
Q5. Is 1 a prime number?
Ans. No. Explanation: It has only one factor.
Q6. Write first five prime numbers.
Ans. 2, 3, 5, 7, 11. Explanation: Only divisible by 1 and itself.
Q7. Write all factors of 12.
Ans. 1, 2, 3, 4, 6, 12. Explanation: All numbers that divide 12 exactly.
Q8. What are even numbers?
Ans. Numbers divisible by 2. Explanation: Example: 2,4,6.
Q9. What are odd numbers?
Ans. Numbers not divisible by 2. Explanation: Example: 1,3,5.
Q10. What is HCF?
Ans. Highest Common Factor. Explanation: Greatest common factor of numbers.
Q11. Find HCF of 12 and 18.
Ans. 6. Explanation: Common factors → 1,2,3,6 → highest is 6.
Q12. What is LCM?
Ans. Least Common Multiple. Explanation: Smallest common multiple.
Q13. Find LCM of 4 and 6.
Ans. 12. Explanation: Multiples → common smallest = 12.
Q14. What are co-prime numbers?
Ans. Numbers having HCF = 1. Explanation: Example: 8 and 15.
Q15. Is 2 the only even prime number?
Ans. Yes. Explanation: All other even numbers are divisible by 2.
Q16. Check if 15 is divisible by 3.
Ans. Yes. Explanation: 1+5=6 → divisible by 3.
Q17. Check if 20 is divisible by 5.
Ans. Yes. Explanation: Last digit is 0 or 5.
Q18. Check if 24 is divisible by 2.
Ans. Yes. Explanation: Last digit is even.
Q19. Find first three multiples of 7.
Ans. 7, 14, 21. Explanation: 7×1, 7×2, 7×3.
Q20. What is the smallest composite number?
Ans. 4. Explanation: It has factors 1,2,4.
📘 Chapter 4: Basic Geometrical Ideas (20 Q&A)
Q1. What is a point?
Ans. A point shows an exact location. Explanation: It has no size, only position.
Q2. What is a line?
Ans. A line is a straight path extending infinitely in both directions. Explanation: It has no endpoints.
Q3. What is a line segment?
Ans. A part of a line with two endpoints. Explanation: It has fixed length.
Q4. What is a ray?
Ans. A line starting from one point and extending infinitely in one direction. Explanation: It has one endpoint.
Q5. What is a plane?
Ans. A flat surface extending infinitely. Explanation: Example: paper surface.
Q6. What are parallel lines?
Ans. Lines that never meet. Explanation: They remain same distance apart.
Q7. What are intersecting lines?
Ans. Lines that meet at a point. Explanation: They cross each other.
Q8. What is a curve?
Ans. A line that is not straight. Explanation: Example: circle boundary.
Q9. What is a polygon?
Ans. A closed figure made of line segments. Explanation: Example: triangle, square.
Q10. What is a triangle?
Ans. A polygon with 3 sides. Explanation: It has 3 vertices.
Q11. What is a quadrilateral?
Ans. A polygon with 4 sides. Explanation: Example: square, rectangle.
Q12. What is a circle?
Ans. A round shape with all points equidistant from center. Explanation: Center to boundary distance is same.
Q13. What is the center of a circle?
Ans. The middle point of a circle. Explanation: All points are equally distant from it.
Q14. What is radius?
Ans. Distance from center to boundary. Explanation: Half of diameter.
Q15. What is diameter?
Ans. Line passing through center connecting two points on circle. Explanation: Diameter = 2 × radius.
Q16. What is chord?
Ans. A line segment joining two points on a circle. Explanation: Diameter is the longest chord.
Q17. What is an arc?
Ans. A part of a circle boundary. Explanation: Small or large curve.
Q18. What is a simple curve?
Ans. A curve that does not cross itself. Explanation: Example: circle.
Q19. What is a closed curve?
Ans. A curve whose ends meet. Explanation: Example: circle.
Q20. What is an open curve?
Ans. A curve whose ends do not meet. Explanation: Example: curved line.
📘 Chapter 5: Understanding Elementary Shapes (20 Q&A)
Q1. What is an angle?
Ans. An angle is formed by two rays meeting at a point. Explanation: The meeting point is called vertex.
Q2. What is a right angle?
Ans. An angle of 90°. Explanation: It looks like the corner of a square.
Q3. What is an acute angle?
Ans. An angle less than 90°. Explanation: It is smaller than a right angle.
Q4. What is an obtuse angle?
Ans. An angle greater than 90° but less than 180°. Explanation: It is wider than a right angle.
Q5. What is a straight angle?
Ans. An angle of 180°. Explanation: It forms a straight line.
Q6. What is a reflex angle?
Ans. An angle greater than 180°. Explanation: It is more than a straight angle.
Q7. What is a complete angle?
Ans. An angle of 360°. Explanation: Full rotation.
Q8. What is a polygon?
Ans. A closed figure made of line segments. Explanation: Example: triangle.
Q9. What is a regular polygon?
Ans. All sides and angles are equal. Explanation: Example: square.
Q10. What is an irregular polygon?
Ans. Sides and angles are not equal. Explanation: Example: rectangle (angles equal but sides not all equal).
Q11. What is a triangle?
Ans. A 3-sided polygon. Explanation: It has 3 angles.
Q12. What is a quadrilateral?
Ans. A 4-sided polygon. Explanation: Example: square.
Q13. What are 2D shapes?
Ans. Flat shapes with length and breadth. Explanation: Example: square, triangle.
Q14. What are 3D shapes?
Ans. Shapes with length, breadth, height. Explanation: Example: cube, sphere.
Q15. What is a face in 3D shapes?
Ans. A flat surface of a solid. Explanation: Example: cube has 6 faces.
Q16. What is an edge?
Ans. Line where two faces meet. Explanation: Cube has 12 edges.
Q17. What is a vertex?
Ans. Corner point where edges meet. Explanation: Cube has 8 vertices.
Q18. What is a cube?
Ans. A 3D shape with equal sides. Explanation: 6 equal square faces.
Q19. What is a cuboid?
Ans. A 3D shape like a box. Explanation: Opposite faces equal.
Q20. What is a sphere?
Ans. A round 3D shape. Explanation: No edges or vertices.
📘 Chapter 6: Integers (20 Q&A)
Q1. What are integers?
Ans. Integers are positive numbers, negative numbers, and zero. Explanation: Example: -3, -2, -1, 0, 1, 2, 3.
Q2. What are positive integers?
Ans. Numbers greater than zero. Explanation: Example: 1, 2, 3.
Q3. What are negative integers?
Ans. Numbers less than zero. Explanation: Example: -1, -2, -3.
Q4. What is zero?
Ans. It is neither positive nor negative. Explanation: It is in the middle on number line.
Q5. What is a number line?
Ans. A straight line showing numbers. Explanation: Right side positive, left side negative.
Q6. Which is greater: -2 or -5?
Ans. -2. Explanation: Number closer to zero is greater.
Q7. Find: 3 + (-2)
Ans. 1. Explanation: Subtract 2 from 3.
Q8. Find: (-4) + (-3)
Ans. -7. Explanation: Add numbers and keep negative sign.
Q9. Find: (-5) + 8
Ans. 3. Explanation: Subtract 5 from 8, sign of bigger number.
Q10. Find: 7 - 10
Ans. -3. Explanation: Result is negative.
Q11. Find: (-6) - 2
Ans. -8. Explanation: Add and keep negative sign.
Q12. Find: (-3) - (-2)
Ans. -1. Explanation: Minus minus becomes plus → -3 + 2.
Q13. What is additive inverse?
Ans. Number which gives zero when added. Explanation: Example: 5 and -5.
Q14. What is absolute value of -7?
Ans. 7. Explanation: Distance from zero.
Q15. Which is smallest: -1, -5, 0, 3?
Ans. -5. Explanation: Most negative is smallest.
Q16. Which is greatest: -2, 0, 4, -1?
Ans. 4. Explanation: Largest positive number.
Q17. Find: 0 + (-5)
Ans. -5. Explanation: Adding zero does not change number.
Q18. Find: (-10) + 10
Ans. 0. Explanation: Additive inverse.
Q19. Find: (-2) + 5 + (-1)
Ans. 2. Explanation: (-2 + 5 = 3), then 3 - 1 = 2.
Q20. What happens when you add two negative numbers?
Ans. Result is negative. Explanation: Add values and keep negative sign.
📘 Chapter 7: Fractions (20 Q&A)
Q1. What is a fraction?
Ans. A fraction represents part of a whole. Explanation: It is written as numerator/denominator.
Q2. What is numerator?
Ans. The top number of a fraction. Explanation: It shows number of parts taken.
Q3. What is denominator?
Ans. The bottom number of a fraction. Explanation: It shows total equal parts.
Q4. What is a proper fraction?
Ans. Fraction where numerator < denominator. Explanation: Example: 3/5.
Q5. What is an improper fraction?
Ans. Fraction where numerator ≥ denominator. Explanation: Example: 7/4.
Q6. What is a mixed fraction?
Ans. Combination of whole number and fraction. Explanation: Example: 2 1/3.
Q7. What are equivalent fractions?
Ans. Fractions having same value. Explanation: Example: 1/2 = 2/4.
Q8. Find equivalent fraction of 1/3.
Ans. 2/6. Explanation: Multiply numerator and denominator by 2.
Q9. Simplify: 4/8
Ans. 1/2. Explanation: Divide both by 4.
Q10. Compare: 1/2 and 1/3
Ans. 1/2 is greater. Explanation: Same numerator → smaller denominator is bigger.
Q11. Add: 1/4 + 1/4
Ans. 1/2. Explanation: Same denominator → add numerators.
Q12. Add: 2/5 + 1/5
Ans. 3/5. Explanation: Denominator same, add numerators.
Q13. Subtract: 5/6 − 2/6
Ans. 3/6 = 1/2. Explanation: Subtract numerators, simplify.
Q14. Add: 1/2 + 1/3
Ans. 5/6. Explanation: LCM = 6 → (3+2)/6.
Q15. Subtract: 3/4 − 1/2
Ans. 1/4. Explanation: LCM = 4 → 3/4 − 2/4.
Q16. Convert 7/3 into mixed fraction.
Ans. 2 1/3. Explanation: 7 ÷ 3 = 2 remainder 1.
Q17. Convert 2 1/5 into improper fraction.
Ans. 11/5. Explanation: (2×5 +1)/5.
Q18. Find: 3/8 of 16
Ans. 6. Explanation: (3×16)/8 = 6.
Q19. Find: 2/3 of 9
Ans. 6. Explanation: (2×9)/3 = 6.
Q20. Solve: 1/2 + 3/4
Ans. 5/4 = 1 1/4. Explanation: LCM = 4 → (2+3)/4.
📘 Chapter 8: Decimals (20 Q&A)
Q1. What is a decimal number?
Ans. A number with a decimal point. Explanation: Example: 2.5, 0.75.
Q2. What is the place value of 5 in 2.5?
Ans. Tenths. Explanation: It is after decimal point.
Q3. What is 0.1 called?
Ans. One-tenth. Explanation: 1/10 = 0.1.
Q4. What is 0.01 called?
Ans. One-hundredth. Explanation: 1/100 = 0.01.
Q5. Convert 1/10 into decimal.
Ans. 0.1. Explanation: Divide 1 by 10.
Q6. Convert 3/10 into decimal.
Ans. 0.3. Explanation: 3 ÷ 10.
Q7. Convert 25/100 into decimal.
Ans. 0.25. Explanation: 25 ÷ 100.
Q8. Write 0.7 as fraction.
Ans. 7/10. Explanation: One digit after decimal → denominator 10.
Q9. Write 0.25 as fraction.
Ans. 25/100 = 1/4. Explanation: Simplify fraction.
Q10. Compare: 0.5 and 0.7
Ans. 0.7 is greater. Explanation: 7 > 5.
Q11. Compare: 0.25 and 0.205
Ans. 0.25 is greater. Explanation: Compare place values.
Q12. Add: 0.3 + 0.2
Ans. 0.5. Explanation: Add digits normally.
Q13. Add: 1.5 + 2.3
Ans. 3.8. Explanation: Align decimal points.
Q14. Subtract: 0.9 − 0.4
Ans. 0.5. Explanation: Subtract digits.
Q15. Subtract: 3.5 − 1.2
Ans. 2.3. Explanation: Align decimals and subtract.
Q16. Add: 2.75 + 1.25
Ans. 4.00 = 4. Explanation: Proper alignment.
Q17. Subtract: 5.00 − 2.35
Ans. 2.65. Explanation: Borrow if needed.
Q18. Find: 0.5 of 20
Ans. 10. Explanation: 0.5 × 20 = 10.
Q19. Find: 0.25 of 40
Ans. 10. Explanation: 1/4 of 40.
Q20. Write 3 rupees 50 paise in decimal.
Ans. 3.50. Explanation: 50 paise = 0.50 rupee.
📘 Chapter 9: Data Handling (20 Q&A)
Q1. What is data?
Ans. Data is a collection of information. Explanation: Example: marks, numbers.
Q2. What is data handling?
Ans. Organizing and representing data. Explanation: Makes data easy to understand.
Q3. What are tally marks?
Ans. Marks used to count data. Explanation: Every 5th mark is a group.
Q4. What is a pictograph?
Ans. Representation of data using pictures. Explanation: Each picture represents a number.
Q5. What is a bar graph?
Ans. Representation of data using bars. Explanation: Height shows value.
Q6. How many tally marks in one group?
Ans. 5. Explanation: Four vertical + one slant.
Q7. If tally marks are ||||, what is the number?
Ans. 4. Explanation: Each line = 1.
Q8. If tally marks are ||||/, what is the number?
Ans. 5. Explanation: Group of five.
Q9. Find total: 5, 10, 15
Ans. 30. Explanation: Add all values.
Q10. Find average of 2, 4, 6
Ans. 4. Explanation: (2+4+6)/3.
Q11. Which graph uses pictures?
Ans. Pictograph. Explanation: Uses symbols.
Q12. Which graph uses bars?
Ans. Bar graph. Explanation: Uses rectangles.
Q13. If 1 picture = 2 apples, how many apples are 3 pictures?
Ans. 6. Explanation: 3 × 2.
Q14. If 1 bar = 10 units, what does 5 bars show?
Ans. 50. Explanation: 5 × 10.
Q15. What is the use of data?
Ans. To understand information. Explanation: Helps in decision making.
Q16. Find total students: 10 boys, 15 girls
Ans. 25. Explanation: Add both.
Q17. Which is larger: 20 or 35?
Ans. 35. Explanation: Compare values.
Q18. Find difference: 50 − 30
Ans. 20. Explanation: Subtract values.
Q19. If a bar graph shows 40 units, what does it mean?
Ans. Value is 40. Explanation: Height represents value.
Q20. What is the first step in data handling?
Ans. Collection of data. Explanation: Gather information first.
📊 Vertical Bar Diagram (Proper Copy Style)
✅ Example: Number of Students in Classes
Table:
| Class | Students |
|---|---|
| A | 10 |
| B | 15 |
| C | 20 |
Bar Diagram (Scale: 1 unit = 5 students)
Students
20 | █
15 | █ █
10 | █ █ █
5 | █ █ █
0 |----------------
A B C
✅ Example 2: Fruits Sold
Table:
| Fruit | Quantity |
|---|---|
| Apple | 5 |
| Mango | 10 |
| Banana | 15 |
Bar Diagram (Scale: 1 unit = 5 fruits)
Quantity
15 | █
10 | █ █
5 | █ █ █
0 |----------------
A M B
✅ Example 3: Marks of Students
Table:
| Student | Marks |
|---|---|
| A | 40 |
| B | 60 |
| C | 50 |
Bar Diagram (Scale: 1 unit = 10 marks)
Marks
60 | █
50 | █ █
40 | █ █ █
30 | █ █ █
20 | █ █ █
10 | █ █ █
0 |----------------
A B C
📘 Chapter 10: Mensuration (20 Q&A)
Q1. What is mensuration?
Ans. It is the measurement of area and perimeter. Explanation: Used to measure shapes.
Q2. What is perimeter?
Ans. The total boundary of a shape. Explanation: Sum of all sides.
Q3. What is area?
Ans. The space inside a shape. Explanation: Measured in square units.
Q4. What is the perimeter of a rectangle?
Ans. 2 × (Length + Breadth). Explanation: Add all sides.
Q5. What is the area of a rectangle?
Ans. Length × Breadth. Explanation: Multiply L and B.
Q6. What is the perimeter of a square?
Ans. 4 × side. Explanation: All sides equal.
Q7. What is the area of a square?
Ans. side × side. Explanation: Square of side.
Q8. Find perimeter of rectangle: L=10, B=5
Ans. 30. Explanation: 2×(10+5)=30.
Q9. Find area of rectangle: L=8, B=4
Ans. 32. Explanation: 8×4=32.
Q10. Find perimeter of square: side=6
Ans. 24. Explanation: 4×6=24.
Q11. Find area of square: side=7
Ans. 49. Explanation: 7×7=49.
Q12. Find perimeter of rectangle: L=12, B=3
Ans. 30. Explanation: 2×(12+3)=30.
Q13. Find area of rectangle: L=9, B=2
Ans. 18. Explanation: 9×2=18.
Q14. Find perimeter of square: side=9
Ans. 36. Explanation: 4×9=36.
Q15. Find area of square: side=5
Ans. 25. Explanation: 5×5=25.
Q16. What is unit of perimeter?
Ans. cm, m. Explanation: Linear units.
Q17. What is unit of area?
Ans. cm², m². Explanation: Square units.
Q18. Which is bigger: 10 cm² or 20 cm²?
Ans. 20 cm². Explanation: Compare values.
Q19. Find area: L=15, B=2
Ans. 30. Explanation: 15×2=30.
Q20. Find perimeter: side=8 (square)
Ans. 32. Explanation: 4×8=32.
📘 Chapter 11: Algebra (20 Q&A)
Q1. What is algebra?
Ans. Algebra uses letters and symbols to represent numbers. Explanation: Example: x, y.
Q2. What is a variable?
Ans. A symbol that represents an unknown value. Explanation: Example: x.
Q3. What is a constant?
Ans. A fixed value. Explanation: Example: 5, 10.
Q4. What is an expression?
Ans. Combination of numbers and variables. Explanation: Example: x + 5.
Q5. What is an equation?
Ans. A statement with equal sign. Explanation: Example: x + 2 = 5.
Q6. Solve: x + 3 = 7
Ans. x = 4. Explanation: 7 − 3.
Q7. Solve: x − 5 = 2
Ans. x = 7. Explanation: 2 + 5.
Q8. Solve: x + 10 = 15
Ans. x = 5. Explanation: 15 − 10.
Q9. Solve: x − 4 = 6
Ans. x = 10. Explanation: 6 + 4.
Q10. Find value: x = 3 in x + 5
Ans. 8. Explanation: 3 + 5.
Q11. Find value: x = 2 in 2x
Ans. 4. Explanation: 2×2.
Q12. Solve: x + 1 = 9
Ans. x = 8. Explanation: 9 − 1.
Q13. Solve: x − 2 = 5
Ans. x = 7. Explanation: 5 + 2.
Q14. What is 3x?
Ans. 3 times x. Explanation: 3×x.
Q15. What is 2x + 5?
Ans. Expression. Explanation: Variable + number.
Q16. Solve: x + 6 = 10
Ans. x = 4. Explanation: 10 − 6.
Q17. Solve: x − 3 = 9
Ans. x = 12. Explanation: 9 + 3.
Q18. Find value: x = 4 in x + 2
Ans. 6. Explanation: 4 + 2.
Q19. Find value: x = 5 in 3x
Ans. 15. Explanation: 3×5.
Q20. What is unknown in algebra?
Ans. A value not known. Explanation: Represented by variable.
📘 Chapter 12: Ratio (20 Q&A)
Q1. What is a ratio?
Ans. A comparison of two quantities. Explanation: Written as a:b.
Q2. Write ratio of 2 and 4.
Ans. 2:4. Explanation: Compare both numbers.
Q3. Simplify ratio 2:4
Ans. 1:2. Explanation: Divide both by 2.
Q4. Write ratio of 10 and 5.
Ans. 10:5 = 2:1. Explanation: Simplify by dividing by 5.
Q5. What does 3:2 mean?
Ans. 3 parts to 2 parts. Explanation: Comparison form.
Q6. Find ratio of 8 to 4
Ans. 2:1. Explanation: Divide both by 4.
Q7. Find ratio of 15 to 5
Ans. 3:1. Explanation: Divide both by 5.
Q8. Convert ratio 4:8 into simplest form
Ans. 1:2. Explanation: Divide both by 4.
Q9. Find ratio of 20 and 10
Ans. 2:1. Explanation: Divide by 10.
Q10. What is equivalent ratio of 2:3?
Ans. 4:6. Explanation: Multiply both by 2.
Q11. Find ratio of 12 and 6
Ans. 2:1. Explanation: Divide by 6.
Q12. Simplify 6:9
Ans. 2:3. Explanation: Divide by 3.
Q13. If boys:girls = 2:3, what does it mean?
Ans. 2 boys for every 3 girls. Explanation: Comparison.
Q14. Find ratio of 25 and 5
Ans. 5:1. Explanation: Divide by 5.
Q15. Find ratio of 9 and 3
Ans. 3:1. Explanation: Divide by 3.
Q16. Simplify 10:20
Ans. 1:2. Explanation: Divide by 10.
Q17. Find ratio of 100 and 50
Ans. 2:1. Explanation: Divide by 50.
Q18. What is simplest form of ratio?
Ans. Ratio in lowest terms. Explanation: No common factor.
Q19. Find ratio of 18 and 6
Ans. 3:1. Explanation: Divide by 6.
Q20. Find ratio of 14 and 7
Ans. 2:1. Explanation: Divide by 7.