a) 75
b) 93
c) 84
d) 57
17) For any natural number n, n4 +n2 +1 is always
a) odd
b) even
c) either even or odd
d) none of these
18) The unit digit in the expression
(256251 +36528+7354) is
a)4
b) 0
c) 6
d) 5
19) The number of zero in 29 ! is
a) 4
b) 3
c) 6
d) 7
20) The sum of first 20 odd counting numbers is
a) 20
b) 100
c) 400
d) 313
21) Find the place value of 4 in 46127.
(a) 4
(b) 400
(c) 40000
(d) 4000
(e) None of the above
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
23) Find the sum of 1st and 2nd prime numbers.
(a) 5
(b) 3
(c) 7
(d) 2
(e) None of the above
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
25) The number of all prime numbers less than 40 is …
(a) 15
(b) 18
(c) 17
(d) 12
(e) None of the above
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
27) Find the sum of first 25 natural numbers.
(a) 432
(b) 315
(c) 325
(d) 335
(e) None of the above
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
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)
30) How many rational numbers are there between 1 and 1000?
(a) 998
(b) 999
(c) 1000
(d) Infinite