# Number System MCQ Questions Answers Quantitative Aptitude

a) 75

b) 93

c) 84

d) 57

Option – a)

17) For any natural number n, n4 +n2 +1 is always

a) odd

b) even

c) either even or odd

d) none of these

Option – a)

18) The unit digit in the expression

(256251 +36528+7354) is

a)4

b) 0

c) 6

d) 5

Option – b)

19) The number of zero in 29 ! is

a) 4

b) 3

c) 6

d) 7

Option – c)

20) The sum of first 20 odd counting numbers is

a) 20

b) 100

c) 400

d) 313

Option – c)

21) Find the place value of 4 in 46127.

(a) 4

(b) 400

(c) 40000

(d) 4000

(e) None of the above

Option – c)

22) The sum of the four consecutive even numbers is 284. What would be the smallest number?

(a) 72

(b) 74

(c) 68

(d) 66

(e) None of the above

Option – c)

23) Find the sum of 1st and 2nd prime numbers.

(a) 5

(b) 3

(c) 7

(d) 2

(e) None of the above

Option – a)

24) Find the difference of place value of 4 and face value of 3 in 3784105.

(a) 3997

(b) 1

(c) 1000

(d) 3845

(e) None of the above

Option – a)

25) The number of all prime numbers less than 40 is …

(a) 15

(b) 18

(c) 17

(d) 12

(e) None of the above

Option – d)

26) The product of two consecutive odd numbers is 6723. What is the greater number?

(a) 89

(b) 85

(c) 91

(d) 83

(e) None of the above

Option – d)

27) Find the sum of first 25 natural numbers.

(a) 432

(b) 315

(c) 325

(d) 335

(e) None of the above

Option – c)

28) What is the sum of all positive integers lying between 200 and 400 that are multiples of 7?

(a) 8729

(b) 8700

(c) 8428

(d) 8278

Option – a)

29) The pair of numbers which are relatively prime to each other is

(a) (68, 85)

(b) (65, 91)

(c) (92, 85)

(d) (102, 153)

Option – c)

30) How many rational numbers are there between 1 and 1000?

(a) 998

(b) 999

(c) 1000

(d) Infinite