Std : 7 1Mental Maths Competition®

Set -3

SECTION 1 (Mental Maths Calculation)

1. (31 × 2) + (25 × 2) = _______(a) 112 (b) 113

(c) 114 (d) 116

2. (34 × 9) + (46 × 7) = _______(a) 418 (b) 328

(c) 628 (d) 682

3. (76 × 3) – (55 × 4) = _______(a) 5 (b) 4

(c) 7 (d) 8

4. (60 × 8) – (6 × 56 ) = _______(a) 169 (b) 144

(c) 225 (d) 196

5. (25% 60) + (50% of 70 )=_______(a) 50 (b) 60

(c) 70 (d) 45

6. (30% of 180) – (10% of 50) =_______(a) 36 (b) 16

(c) 49 (d) 25

7. (half of 90) + ( 41

of 64) =

_______(a) 60 (b) 59

(c) 63 (d) 61

8. (one third of 180) – (51

of 200)

= _______(a) 20 (b) 30

(c) 40 (d) 50

9. (10% of 90) + (3% of 90) =_______(a) 17.1 (b) 12.1

(c) 11.7 (d) 17.7

10. (20% of 100) + (5% of 60) =_______(a) 25 (b) 23

(c) 26 (d) 24

11. square of 12 + square of 21 =_______(a) 625 (b) 525

(c) 685 (d) 585

12. square of 9 – square 8 =_______(a) 17 (b) 18

(c) 12 (d) 20

13. (cube of 4) + (cube of 6) =_______(a) 180 (b) 460

(c) 280 (d) 160

Std : 7 2Mental Maths Competition®

Set -3

14. (cube of 9) – (cube of 8) =_______(a) 217 (b) 218

(c) 215 (d) 230

15. 225 × 196 = _______(a) 410 (b) 169

(c) 210 (d) 16

16. 625 – 576 = _______(a) 3 (b) 2

(c) 5 (d) 1

17. 324 + 400 = _______(a) 9 (b) 38

(c) 16 (d) 25

18. 338 ÷ 2 = _______(a) 13 (b) 14

(c) 15 (d) 16

19. The sum of divisors of 16 is_______(a) 11 (b) 10

(c) 31 (d) 5

20. The sum of all primedivisors of 35 is _______(a) 7 (b) 10

(c) 5 (d) 12

21. Select the smallest numberobtained from the givenoperations.(a) 576 – 4 (b) 169 + 6

(c) 441 – 1 (d) 121 + 3

22. Select the greatest numberobtained from followingoperations.(a) 625 + 3 (b) 576 - 3

(c) 441 + 4 (d) 121 + 4

23. If 324 is divided by 18, theremainder is _______(a) 1 (b) 5

(c) 0 (d) 18

24. If 120 is divided by 13, theremainder is _______(a) 4 (b) 3

(c) 5 (d) 7

25. If 120 is divided by 11, theremainder is _______(a) 9 (b) 20

(c) 11 (d) 10

26. If 160 is divided by 22 theremainder is _______(a) 4 (b) 8

(c) 6 (d) 7

Std : 7 3Mental Maths Competition®

Set -3

27. 1243 × 79 = _______(a) 8197 (b) 81997

(c) 98197 (d) 981197

28. 4926 × 14 = _______(a) 68964 (b) 68954

(c) 68974 (d) 68966

29. 3.08 × 19 = _______(a) 85.28 (b) 585.2

(c) 28.52 (d) 58.52

30. 5.1 × 6.8 = _______(a) 32.68 (b) 34.68

(c) 33.68 (d) 35.68

31. H.C.F of 15, 30, 45 is _______(a) 10 (b) 25

(c) 15 (d) 30

32. L.C.M. of 9, 18 and 27 is_______(a) 54 (b) 48

(c) 46 (d) 49

33. 19.40 + 3.050 + 4.16 = _____(a) 21.69 (b) 21.61

(c) 2661 (d) 26.61

34. 26 – 7.3 + 9.07 + 0.009 =_______(a) 29.699 (b) 27.779

(c) 30.799 (d) 28.899

35. 753

+ 453

=

(a) 561

(b) 551

(c) 571

(d) 572

36. – 37

= 61

(a) 23

(b) 37

(c) 25

(d) 29

37. (46 × 31) + (42 × 5) = _______(a) 1536 (b) 1636

(c) 1436 (d) 1736

38. Double of 1249 is _______(a) 624 (b) 6418

(c) 24.98 (d) 2498

39. Half of 6374 is _______(a) 3137 (b) 3147

(c) 3187 (d) 3157

40. The ratio of 80 min to 3hours is _______(a) 4:9 (b) 8:3

(c) 9:4 (d) 3:8

Std : 7 4Mental Maths Competition®

Set -3

41. [99 – {66 ÷ (66 ÷ 3)}] – 40(a) 56 (b) 46

(c) 76 (d) 66

42. Which of the following pairsof number do not havecommon factor other than 1.(a) 24, 18 (b) 26,52

(c) 17,34 (d) 17, 18

43. [4² + 8² + 6²] – 324(a) 79 (b) 118

(c) 98 (d) 108

44.

35

37

+

61

67

=

(a) 21

(b) 12

(c) 31

(d) 34

45. 4.1 × 0.4 × 9.9 = _______(a) 16.236 (b) 162.36

(c) 6.236 (d) 1.623

46. 0.64 ÷ 0.2 = _______(a) 4.2 (b) 5.2

(c) 3.2 (d) 6.2

47. Naren bought car for sold` 3,60,000. After 4 months hesold it out at a loss of 18%find the selling price of a car.(a) 295200 (b) 395200

(c) 285200 (d) 269200

48. On the purchase of a shirtand pant Ramesh got adiscount of 10% and 5%respectively. If M.R.P. ofshirt is ̀ 200 and pant is` 300.How much he was topay for 5 shirts and 5 pantsafter discount(a) ̀ 3325 (b) ̀ 2375

(c) ̀ 2325 (d) ̀ 2475

49. What will be the Sixth termin as per given numberpattern 45, 54, 63, __, __, __(a) 81 (b) 72

(c) 80 (d) 90

50. Write as percentage 2 43

(a) 225% (b) 275%

(c) 11.4% (d) 175%

51. 720 centigram = ___ hectogram(a) 0.076 (b) 0.073

(c) 0.0720 (d) 0.71

SECTION 2(Mental Maths Concepts)

Std : 7 5Mental Maths Competition®

Set -3

52. 468 decilitre = _____Decalitre(a) 0.468 (b) 46.8

(c) 4.068 (d) 4.68

53. Find the ratio of :-

2 and 21

year, 4 years 3

months

(a) 5120

(b) 5150

(c) 5130

(d) 513

54. The average of five numbersis 13. If sum of first fournumbers is 64 find the fifthnumber.(a) 2 (b) 1

(c) 19 (d) 9

55. If the measure of two anglesof triangle is 300 and 700

resp. Find the measure ofremaining angle.(a) 800 (b) 400

(c) 600 (d) 700

56. The measure of an angle is60.40. Find the measure ofits complementary angle.(a) 16.90 (b) 29.60

(c) 39.60 (d) 19.60

57.

In the given rectangle ABCDand PQRS the area ofshaded portion is _______ sq cm.(a) 30 (b) 40

(c) 6 (d) 20

58. If the length of congruentsides of isosceles triangle is6.3 cm and perimeter is17.5 cm. The length of 3rdside is ________ cm(a) 5.4 (b) 6.6

(c) 4.9 (d) 3.6

59. A square has a side of30 cm. A smaller square ofside 15 cm has been cut outof it. The area remaining is________ sq. cm(a) 225 (b) 125

(c) 485 (d) 675

60. If the radius of circle is14 cm. Find it area if( = 22/7)(a) 616 sq cm (b) 446 sq cm

(c) 366 sq cm (d) 516 sq cm

A

D

B

C

P

S

Q

R

4 cm3 cm

2 cm

9 cm

Std : 7 6Mental Maths Competition®

Set -3

SECTION 3 (Mental Maths Challenge)

61. A dinner of `2900 was shared by 6 people. If Mr. Jain paid ` 50more than each of other people, how much did Mr. Jain pay?

(a) ` 525 (b) ̀ 530 (c) ̀ 520 (d) ̀ 450

62. In a triangle ABC, measures of B is twice of measure of A andmeasure of C = 30°, find the measure of A.(a) 90° (b) 60° (c) 50° (d) 40°

63. 2743

271

741

= ?

(a) 563

(b) 564

(c) 565

(d) 566

64. Mrs. Singh earns ̀ 6000 per month, After getting 20% increasein salary, calculate her annual income as per new salary.(a) ̀ 64800 (b) ̀ 86400 (c) ̀ 84600 (d) ̀ 18640

65. Pratham walked 25

km to his school, he walked 25 m to his friend

Rahul’s house. Then he walked 21

km back to his home. How far

did he walk?(a) 3.6 km (b) 3.45 km (c) 3.25 km (d) 3.025 km

Std : 7 7Mental Maths Competition®

Set -3

66. Rajan has scored 86 marks in his English test, but he has thesame score for his History and Maths paper. If his average scorefor 3 subject is 80 marks. What score does he get for the Mathstest?(a) 77 (b) 40 (c) 94 (d) 184

67. During a sport day, there were 328 more boys than girls andthere were 320 fewer teachers than girls. How many people werethere altogether if there were 73 teachers?(a) 1167 (b) 1177 (c) 1187 (d) 1197

68.

)

71

713(

73

733 = ?

(a) 49376

(b) 49576

(c) 49486

(d) 49936

69.4m

= 9 Find the value of m.

(a) 13 (b) 36 (c) 6 (d) 1296

70. If 60% of the students in a school are boys and the girls numberis 472 . How many boys are there?(a) 706 (b) 708 (c) 705 (d) 704

Std : 7 8Mental Maths Competition®

Set -3

71. The figure below is made up of similar small squares. If the areaof the figure is 486 cm2, then its perimeter is ______

(a) 81 cm (b) 90 cm (c) 54 cm (d) 49 cm

72. Mrs. Sharma spent 41

of her money and 600 is left. How much

did she have first(a) ` 700 (b) ̀ 600 (c) ̀ 800 (d) ̀ 750

73. 12% of 48.36 will be how much more than 6% of 36.48(a) 30.6144 (b) 11.88 (c) 36.144 (d) 3.6144

74. When an article is sold for ̀ 910, the loss is 30% What is the costprice of the article ?(a) ̀ 1170 (b) ̀ 1300 (c) ̀ 1250 (d) ̀ 1360

75. The sum of 3 consecutive even numbers is 90. Find thesmallest of them.(a) 28 (b) 32 (c) 26 (d) 30

Std : 7 9Mental Maths Competition®

Set -3