### Aptitude - Numbers Question And Answers

2, 6, 12, 20, 30, 42, 56, (__)

A.  60

B.  64

C.  72

D.  70

Let N = 553 + 173 - 723. N is divisible by:

A.  both 7 and 13

B.  both 3 and 13

C.  both 17 and 7

D.  both 3 and 17

6, 12, 48, 100, 384, 768, 3072 Find out the wrong number in the series.

A.  768

B.  100

C.  384

D.  12

E.  48

40.83 x 1.02 x 1.2 =?

A.  41.64660

B.  49.97592

C.  42.479532

D.  58.7952

The H.C.F. of 2923 and 3239 is :

A.  37

B.  47

C.  73

D.  79

The value of (4.7 x13.26 + 4.7 x 9.43 + 4.7 x 77.31 ) is

A.  0.47

B.  47

C.  470

D.  4700

Given that 268*74 =19832, find the values of 2.68 * 0.74.

A.  1.9832

B.  1.9831

C.  1.8831

D.  1.9952

How many factors of 25*36*52 are perfect squares?

A.  20

B.  24

C.  26

D.  28

H.C.F. of 3240, 3600 and a third number is 36 and their L.C.M. is 2^4 x 3^5 x 5^2 x 7^2 The third number is:

A.  2^2 x 3^5 x 7^2

B.  2^2 * 5^3 * 7^2

C.  2^2 * 5^2 * 7^2

D.  2^3 * 3^5 * 7^2

If n is a natural number, then (6n2 + 6n) is always divisible by:

A.  6 only

B.  12 only

C.  6 and 12 both

D.  by 18 only

An automobile financier claims to be lending money at simple interest, but he includes the interest every six months for calculating the principal. If he is charging an interest of 10%, the effective rate of interest becomes:

A.  10%

B.  10.25%

C.  10.5%

D.  None of these