Maths Std 4

Math sums for std 4

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1. What is the sum of 456 and 278?

Solution
Correct: C
Add the ones: 6 + 8 = 14 (write 4, carry 1 ten). Add the tens: 5 + 7 + 1 carried = 13 (write 3, carry 1 hundred). Add the hundreds: 4 + 2 + 1 carried = 7. So 456 + 278 = 734.

2. Subtract 389 from 702.

Solution
Correct: A
We need to regroup. 702 − 389: ones column 2 < 9, so borrow 1 ten (0 tens becomes 9 tens and 2 becomes 12 ones). 12 − 9 = 3. Tens column 9 − 8 = 1. Hundreds column 6 − 3 = 3. Answer = 313.

3. Which number is 7 hundreds, 4 tens and 9 ones?

Solution
Correct: A
7 hundreds = 700, 4 tens = 40, 9 ones = 9. 700 + 40 + 9 = 749.

4. Round 865 to the nearest ten.

Solution
Correct: B
Look at the ones digit (5). Because it is 5 or more, we round the tens digit up from 6 to 7, giving 870.

5. A baker packs 48 muffins equally into 6 boxes. How many muffins in each box?

Solution
Correct: C
Divide 48 by 6: 48 ÷ 6 = 8. Each box holds 8 muffins.

6. Which fraction is equivalent to 2/3?

Solution
Correct: C
Multiply numerator and denominator of 2/3 by 4: (2×4)/(3×4)=8/12, so 8/12 equals 2/3.

7. What is the perimeter of a rectangle 9 cm long and 5 cm wide?

Solution
Correct: A
Perimeter = 2 × (length + width) = 2 × (9 + 5) = 2 × 14 = 28 cm.

8. How many vertices does a cube have?

Solution
Correct: B
A cube has 8 corners (vertices).

9. What is the next number in the pattern: 3, 6, 12, 24, ?

Solution
Correct: B
Each number is double the previous: 3×2=6, 6×2=12, 12×2=24, so 24×2=48.

10. A movie starts at 2:45 p.m. and lasts 1 hour 30 minutes. When does it end?

Solution
Correct: C
Add 1 h to 2:45 p.m. → 3:45 p.m., then add 30 min → 4:15 p.m.

11. Which number is 200 more than 1 359?

Solution
Correct: B
1 359 + 200 = 1 559.

12. What is 8 × 7?

Solution
Correct: B
8 × 7 = 56.

13. Convert 3 metres into centimetres.

Solution
Correct: B
1 m = 100 cm, so 3 m = 3 × 100 = 300 cm.

14. Which digit is in the thousands place of 4 726?

Solution
Correct: C
Place values: 4 thousands, 7 hundreds, 2 tens, 6 ones. The thousands digit is 4.

15. A shape has 5 equal sides and 5 angles. What is it called?

Solution
Correct: B
A polygon with 5 sides is a pentagon.

16. What is 45 divided by 9?

Solution
Correct: B
45 ÷ 9 = 5.

17. Which of these is the greatest: 0.9, 0.89, 0.98, 0.8?

Solution
Correct: C
Compare tenths: 9 is highest. 0.98 has 9 tenths and 8 hundredths, so it is greatest.

18. A water tank holds 25 litres. If 7 litres leak out, how much is left?

Solution
Correct: B
25 L − 7 L = 18 L.

19. What is the area of a square with side 6 cm?

Solution
Correct: B
Area = side × side = 6 × 6 = 36 cm².

20. Which number makes the equation true: 8 × ? = 64

Solution
Correct: C
64 ÷ 8 = 8, so 8 × 8 = 64.

21. How many minutes are in 2 hours 15 minutes?

Solution
Correct: B
2 hours = 120 min, 120 + 15 = 135 min.

22. What is 4 000 + 300 + 20 + 5?

Solution
Correct: B
Add place values: 4 000 + 300 = 4 300; 4 300 + 20 = 4 320; 4 320 + 5 = 4 325.

23. A triangle has sides 7 cm, 7 cm and 4 cm. What kind is it?

Solution
Correct: B
Two sides are equal (7 cm), so it is isosceles.

24. What is 9 squared?

Solution
Correct: B
9 × 9 = 81.

25. Which of these is an even number: 3 847, 4 002, 5 111, 7 777?

Solution
Correct: B
An even number ends in 0, 2, 4, 6 or 8. 4 002 ends in 2, so it is even.

26. A book costs ₹48. If you pay with ₹100, how much change do you get?

Solution
Correct: C
100 − 48 = 52. Change is ₹52.

27. What is 1/4 of 2 metres in centimetres?

Solution
Correct: B
2 m = 200 cm. 1/4 of 200 cm = 200 ÷ 4 = 50 cm.

28. Which expression equals 36?

Solution
Correct: B
9 × 4 = 36.

29. A train journey takes 3 hours 20 minutes. If it starts at 7:40 a.m., when does it finish?

Solution
Correct: B
Add 3 h to 7:40 a.m. → 10:40 a.m., then add 20 min → 11:00 a.m.

30. What is 0.5 as a fraction in simplest form?

Solution
Correct: B
0.5 = 5/10 = 1/2 when simplified.

31. A packet has 84 sweets shared among 12 children. How many sweets each?

Solution
Correct: B
84 ÷ 12 = 7. Each child gets 7 sweets.

32. Which number is 100 less than 2 050?

Solution
Correct: B
2 050 − 100 = 1 950.

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