In this article, we will study about Number system with their answers. All this questions are asked in previous year SSC CGL examinations.So all this questions are very important from examination point of view.

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1. The sum of three consecutive odd natural numbers is 147.Then, the last number is
(1).44
(2).45
(3).51
(4).49

2. The sum of first 21 odd natural numbers is equal to
(1).361
(2).441
(3).484
(4).254

3. The sum of all natural numbers from 50 to 90 is:
(1).1953
(2).2568
(3).2870
(4).3123

4. The sum of all natural numbers between 29 and 152. which are multiples of 3 is :
(1).3801
(2).3690
(3).4001
(4).4356

5. The sum of the squares of three consecutive natural numbers is 3074. Then, what is the last number?
(1).31
(2).33
(2).30
(4).35

6. The sum of three consecutive odd
natural numbers is 267. The
middle number is:
(1).79
(2).89
(3).85
(4).93

7. Sum of three consecutive even integers is 96. Find the least among them.
(1).30
(2).28
(3).26
(4).32

8. The sum of three consecutive numbers is 96. The middle number is
(1).23
(2).32
(3).27
(4).29

9. What is the sum of two consecutive even numbers, the difference of whose square is 204
(1).78
(2).102
(3).98
(4).114

10. The sum of all the natural num-
bers from 51 to 100 is
(1).4525
(2).3775
(3).3225
(4).4325

11. The sum of all the 2-digit numbers is
(1).4801
(2).4905
(3).5176
(4).4356

12. The sum of first 80 odd natural
numbers is
(1).5050
(2).6440
(3).6950
(4).5450

13. The sum of all the 3-digit num-
bers, each of which on division
by 5 leaves remainder 3, is
(1).18008
(2).71550
(3).99090
(4).56025

14. The sum of all the 3-digit
numbers is
(1).97457
(2).124846
(3).467345
(4).494550

15. Out of eight consecutive natural
numbers, if the sum of first four
is 42, what is the sum of the
other four ?
(1).76
(2).25
(3).58
(4).45

16. In a division problem, the divisor is 4 times the quotient and 3 times the remainder. If remainder is 4, the dividend is
(1).36
(2).40
(3).12
(4).30

17. Each member of a picnic party contributed twice as manyrupees as the total number of members and the total collection is 3042. The number of members present in the party is
(1).34
(2).36
(3).40
(4).39

18. How many natural numbers divisible by 7 are there between 3 and 200?
(1).27
(2).28
(3).29
(4).36

19. The sum of first sixty numbers
from one to sixty is divisible by
(1).29
(2).13
(3).59
(4).61

20. A number when divided by 3 leaves a remainder 1. When the quotient is divided by 2, it leaves a remainder 1. What will
be the remainder when the number is divided by 6
(1).3
(2).4
(3).5
(4).2

21. The product of two numbers is 9375 and the quotient, when the larger one is divided by the smaller, is 15. The sum of the numbers is
(1).395
(2).400
(3).380
(4).425

22. A number, when divided by 119, leaves a remainder of 19. If it is divided by 17, it will leave a remainder of
(1).19
(2).7
(3).10
(4).2

23. (7^19+2) is divided by 6, the remainder is
(1).5
(2).2
(3).3
(4).1

24. When a number is divided by 357 the remainder is 39. If that number is divided by 17, the remainder will be
(1).0
(2).5
(3).3
(4).11

25. Anumber divided by 68 gives the
quotient 269 and remainder zero. If the same number is divided by 67, the remainder is
(1).0
(2).1
(3).3
(4).2

26. A number when divided by 6 leaves remainder 3. When the square of the same number is divided by 6, the remainder is
(1).0
(2).1
(4).3
(3).2

27. When a number is divided by 893, the remainder is 193. What will be the remainder when it is divided by 47?
(1).5
(2).3
(3).33
(4).25

28. A number divided by 13 leaves a
remainder 1 and if the quotient, thus obtained, is divided by 5, we get a remainder of 3. What will be the remainder if the number is divided by 65 ?
(1).28
(2).18
(3).16
(4).40

29. Which of the following number is NOT divisible by 18?
(1).54036
(2).50436
(3).34056
(4).65043

30. 64329 is divided by a certain number. While dividing, the numbers, 175, 114 and 213 appear as three successive remainders. The divisor is
(1).184
(2).234
(3).224
(4).296

31. In a question on division, the divisor is 7 times the quotient and 3 times the remainder. If the remainder is 28, then the dividend is
(1).588
(2).823
(3).784
(4).1036

32. If two numbers are each divided by the same divisor, the remainders are respectively 3 and 4. If
the sum of the two numbers be divided by the same divisor, the remainder is 2. The divisor is
(1).7
(2).6
(3).5
(4).3

33. A number consists of two digits. If the number formed by interchanging the digits is added to the original number, the resulting number (i.e. the sum) must be divisible by
(1).11
(2).9
(3).5
(4).3

34. A number when divided by 5 leaves a remainder 3. What is the remainder when the square of the same number is divided by 5?
(1).1
(2).2
(3).3
(4).4

35. A number when divided by 192 gives a remainder of 54. What remainder would be obtained on dividing the same number by 16 ?
(1).2
(2).4
(3).6
(4).8

36. A number, when divided by 136, leaves remainder 36. If the same number is divided by 17, the remainder will be
(1).9
(2).7
(3).3
(4).2

37. Two numbers, when divided by 17, leave remainders 13 and 11 respectively. If the sum of those two numbers is divided by 17, the remainder will be
(1).13
(2).11
(3).7
(4).4

38. Anumber, when divided by 221, leaves a remainder 64. What is the remainder if the same number is divided by 13?
(1).0
(2).1
(3).11
(4).12

39. When 'n' is divisible by 5 the remainder is 2. What is the remainder when n^2 is divided by 5?
(1).2
(2).3
(3).1
(4).4

40. The remainder when 3^21 is divided by 5 is
(1).1
(2).2
(3).3
(4).4