Mental Maths for Class 4 with Answers
Mental Maths
for Class 4 contains
every type of mental maths questions for class 4 students.
In this post, you will find 80 mental maths questions with answers.
Mental Maths
for Class 4 covers the following topics:
 Large Numbers
 Addition and subtraction
 Multiplication
 Division
 Shapes
 Patterns and symmetry
 Perimeter and area
 Money
 Mental Maths for Class 1
 Mental Maths for Class 2
 Mental Maths for Class 3
 Mental Maths for Class 4
 Mental Maths for Class 5
 Mental Maths for Class 6
 Mental Maths for Class 7
 Mental Maths for Class 8
Mental Maths for Class 4 with Answers
Choose the correct option.
1. Which of the
following is the smallest?
a. 7324 rounded off to the nearest 10
b. 7318
rounded off to the nearest 10
c. 7349 rounded off to the nearest 100
d. 7351 rounded off to the nearest
100
2. The prices of four air conditioners
are ₹ 32,760, ₹ 33,460, ₹ 30,720 and ₹ 31,690. The cheapest air conditioner
is
a. ₹ 32,760
b. ₹ 33,460
c. ₹ 30,720
d. ₹ 31,690
3. The smallest 5digit number that
can be formed using the digits 0, 2, 3, 5 and 6 is
a. 23,560
b. 23,650
c. 20,356
d. 20,563
4. The largest 6digit number with 0
as one of its digits is
a. 9,99,909
b. 9,99,099
c. 9,09,990
d.
9,99,990
5. The cost of a refrigerator is ₹ 100 less than ₹ 16,590. Its actual cost is
a. ₹ 16,490
b. ₹ 15,590
c. ₹ 17,590
d. ₹ 15,690
6. The difference between the place
values of 5 in 34,509 and 67,235 is
a. 505
b. 525
c. 495
d. 475
7. The population of a village is 7892.
When it is rounded off to the nearest 1000, the population will be
a. 7000
b. 7800
c. 8000
d. 7900
8. The weight of a blue whale is 1235
kg. If the weight is rounded off to the nearest hundred, it will be
....................... kg.
a. 1300
b. 1200
c. 1230
d. 1240
9. While filling
a form, Sruti writes the age of her father as XXXIX. What is the age of her
father?
a. 29 years
b. 39 years
c. 49 years
d. 34 years
10. One more than
the greatest 5digit number is
a. 1000
b. 10000
c. 100000
d. 1000000
Answer
the following.
11. Find the
sum of 100 and the largest 5digit number. ..............................
12. What is
30104 + 326? ..............................
13. 7 + 70 +
.................... + 7000 = 7077
14. The
difference between the largest 5digit even number and the smallest 5digit
even number is ..................... .
15. The sum
of the smallest 5digit odd number and the smallest 4digit odd number is
..................... .
16. Find the
sum of 1000 and the smallest 6digit odd number. ..............................
17. What
needs to be subtracted from 83,897 to get 83,797?
.............................. .
Choose
the correct option in Q.18 to Q.20.
18. The
difference between the largest 6digit number and the smallest 6digit number
is
a. 99999
b. 10000
c. 899999
d. 12000
19. A school
library has 13,465 books. 4120 more books are added to the library. The total
number of books in the library is
a. 17,585
b. 17,680
c. 19,505
d. 17,013
20. The sum
of the smallest 6digit odd number and the largest 5digit even number is
a. 19,999
b. 8,99,999
c. 1,99,999
d. 1,27,300
Solve
the following.
21. Compute
12 × 70: ___________
22. Find 11
× 3 × 10: ___________
23. What is
27 × 1000? ___________
24. 23 × 614
= 614 × ___________
25. Find 8 × 16 × 0: __________
Choose the correct option.
26. The value of
19 × 100 is _________.
a. 19 b. 190
c. 1900 d. 19000
27. A car covers 15 km with 1 litre of petrol. The distance covered by
the car with 28 litres of petrol is __________.
a. 420 km b. 280 km
c. 140 km d. 560 km
28. The value of 13(35 + 45) is equal to ____________.
a. 13 × 70 b. 13 × 80
c. 13 × 35 d. 13 × 45
29. The value of 16 × 300 is the same as ____________.
a. 16 × 3
b. 16 × 30
c. 8 × 3 × 100
d. 48 × 100
30. Fill in the missing numbers. One has been done for you.
Number of spider 
Number of legs 
1 
8 
12 

42 

74 

Who am I?
31. I am a number greater than 45, but
less than 50. When I am divided by 11,
I leave a remainder 3. I am
____________ .
32. I am a number less than 80, but
greater than 70. When I am divided by 8, the
remainder is 2. I am ____________ .
33. I am a number greater than 64, but
less than 68. I leave 1 as remainder when divided by 5. I am ____________ .
34. I am a number greater than 72 and
less than 85. I leave 5 as remainder when divided by 12. I am ____________ .
35. I am a number greater than 12 × 5
and less than 13 × 5. When I am divided by 6,
I leave a remainder 4. I am
_____________ .
Choose the correct option.
36. Rohan has ₹ 132 and he wants to
buy pens. Each pen costs ₹ 12. How many pens can he buy?
a. 10 b. 11
c. 12 d. 13
37. The product of two numbers is 1200.
If one of them is 30, then the other number is
a. 400 b. 40
c. 50 d. 300
38. Hema paid ₹ 4500 as halfyearly
membership in a gym. The monthly fee is
a. ₹ 700 b. ₹ 600
c. ₹ 500 d. ₹ 750
39. The money collected towards a
oneday trip amounts to ₹ 8500. If 50 students were going for the trip, then
the contribution of each student is
a. ₹ 150 b. ₹ 160
c. ₹ 170 d. ₹ 180
40. 14 boxes weigh 420 kg. The weight
of one box is
a. 30 kg b. 50 kg
c. 40 kg d. 35 kg
Answer
the following.
41. What is
the diameter of a circle if its radius is 11 cm? _____________
42. Name two
different polygons with each one having 4 sides. _____________
43. A point
where the edges of a polygon meet, is called a _____________.
44. A ruler
is used to measure and draw a _____________.
45. A curve
that begins and ends at the same point is known as a _____________.
46. A
hexagon has _____________ sides.
47. The
distance around a circle is called the _____________.
48. Name a
solid shape with exactly two flat faces. _____________
49. Name a
solid shape with no edges and no corners. ____________
50. A
rectangular water tank is an example of _____________.
51. How many
lines of symmetry does a square have? ______________
52. How many
lines of symmetry does a regular hexagon have? _____________
53. In how
many equal parts does the line of symmetry divide a figure? _________
54. Is 150,
140, 130 and 120 a growing pattern or a decreasing pattern? _________
55. The next
term in the pattern 21, 31, 41, 51 is ___________.
56.
Honeycomb is an example of ____________ pattern.
57. The
image which falls completely on the other half of the figure is called a _________.
58. 1, 2, 4, 7, 11, 16, 22, ……………
59. 100, 99, 97, 94, 90, 85, 79,
…………….
60. Observe
the pattern and fill in the blanks.
a.
3 × 19 = (3 × 20) – 3 = 60 – 3 = 57
4 × 19 = (4 × 20) – 4 = 80 – 4 = 76
5 × 19 = ................... –
........... = ........... – ........... = ...........
6 × 19 =
................... – ........... = ........... – ........... = ...........
b.
800000 ÷ 4 = 200000
80000
÷ 4 = 20000
8000
÷ 4 = ...................
800
÷ 4 = ...................
80 ÷ 4 =
...................
Fill in the
blanks.
61. The perimeter of a square of side 13 cm is ____________.
62. If the length and the breadth of a rectangle are 12 cm and 8 cm, respectively, then its perimeter is _____________.
63. If the lengths of three sides of a triangle are 11 cm, 9 cm and 7 cm, then the perimeter of the triangle is _____________.
64. In an irregular figure, area of a square which is half or more than half covered is to be taken as _____________.
65. The perimeter of a rectangle is 44 cm. If its length is 12 cm, then its breadth is ______________.
66. The perimeter of a triangle is 86 cm. Two of its sides are 28 cm and 32 cm. The length of the third side is ______________.
67. If the
length of a square is doubled, then its perimeter becomes __________.
68. The area of a square with side 6
cm is ………………… .
69. The area of a rectangle with
dimensions 8 cm by 6 cm is …………………. .
70. Find the perimeter of the following figures.
Answer the following.
71. How many paise make 4 rupees 35 paise? _____________
72. How many rupees are there in 520 paise? _____________
73. How much money do you need to buy 8 books each costing ₹ 145? ________
74. Is ₹ 1250 enough to buy 5
Tshirts each costing ₹ 240?
_____________
75. Which is more profitable? Buying a packet of one dozen pencils for ₹ 48 or buying 8 pencils each costing ₹ 5?_____________
76. A group of students rented 4 identical crowns for a play. The rent of 1 crown is ₹ 150. What is the total rent of the crowns? _____________
77. 5 students decide to buy a gift for their teacher. If the budget is ₹ 250, what will be the share of each student? _______________
78. Two identical Tshirts and 2 identical shirts cost ₹ 1600 altogether. If the cost of 1 Tshirt is ₹ 350, then what is the cost of 1 shirt? _____________
79. How many 50rupee notes can you get from a 500rupee note?
____________
80. How many 100rupee notes can you get from ten 200rupee notes? ________
ANSWERS
1. c 2. c
3. c 4. d
5. a 6. c
7. c 8. b
9. b 10. c
11. 1,00,099 12. 30,430
13. 0 14. 89,998
15. 11,002 16. 1,01,001
17. 100 18. c
19. a 20. c
21. 840 22. 330
23. 27,000 24. 23
25. 0 26. c
27. a 28. b
29. d
30.
Number
of spider 
Number
of legs 
1 
8 
12 
96 
42 
336 
74 
592 
31. 47 32. 74
33. 66 34. 77
35. 64 36. b
37. b 38. d
39. c 40. a
41. 22 cm
42. Square and rectangle
43. Vertex 44. Line segment
45. Closed curve 46. 6
47. Circumference 48. Cylinder
49. Sphere 50. Cuboid
51. 4 52. 6
53. 2 54. Decreasing pattern
55. 61 56. Tessellation
57. Symmetrical image
58. 29 59. 72
60. a. 5 × 19 = (5 × 20) – 5 = 100 – 5
= 95
6 × 19 = (6 × 20) – 6 = 120 – 6 = 114
b. 2000, 200, 20
61. 52 cm 62. 40 cm
63. 27 cm 64. 1 sq. units
65. 10 cm 66. 26 cm
67. double 68. 36 sq. cm
69. 48 sq. cm
70. a. 18 cm b. 23 cm
c. 12.5 cm d. 17.5 cm
71. 435 paise 72. 5 rupees 20 p
73. ₹ 1160 74. Yes
75. one dozen pencils for ₹ 48
76. ₹
600 77. ₹ 50
78. ₹
450 79. 10
80. 20
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