# Number Series Questions

Q:

What letters will fill the blank?

Z, X, V, T, R, __,__

 A) M, N B) P, N C) O, K D) K, S

Explanation:

Here the letter series is alternative reverse order series. So we get P, N.

78 44781
Q:

H T 6 # E 7 $K I L % 3 P @ 2 A J R U 4 * V D What will come in place of the question mark(?) in the following series based on the above arrangement ? T#6 7K$  L3% ?

 A) @2A B) A@2 C) 2A@ D) None of these

Explanation:

44 43841
Q:

Find the missing number in the given series ?

15, 51, 216, 1100, ?, 46452

 A) 5660 B) 6560 C) 6750 D) 6630

Explanation:

Let first no. be "k" and multiple be "l"...start value of y with 3
then,
[(k x y) + {l x (l-1)}]
Thus, we get

15 x 3 + 3 x 2 = 51
51 x 4 + 4 x 3 = 216
216 x 5 + 5 x 4 = 1100
1100 x 6 + 6 x 5 = 6630
6630 x 7 + 7 x 6 = 46452

Therefore, the missing number is 6630.

75 42852
Q:

Find the missing term in the following series ?

10000, 11000, 9900, 10890, ?, 10781

 A) 10423 B) 9801 C) 10241 D) 9712

Explanation:

Clearly, alternatively we add and subtract 10% of a term to obtain the next term of the series.
Thus, 10000 + (10% of 10000)= 11000;
11000 - (10% of 11000) = 9900;
9900 + (10% of 9900)  = 10890;
10890 - (10% of 10890) = 9801.
9801 + (10% of 9801)  = 9801+980 = 10781.
So, missing term = 10890- (10% of 10890)= 9801.

128 41421
Q:

Which Number would come in place of the underline mark in the series.

3, 9, 21, ___ , 93

 A) 39 B) 45 C) 48 D) 51

Explanation:

First difference is 6 and second is 12. But if we take third as 18, then fourth difference will be 24. Then 93 can not be the last term.

So we have to take the difference as 6, 12, 24 and 48.

So Answer is 21+24 = 45

36 41153
Q:

Find out the wrong term in the series 2, 3, 4, 4, 6, 8, 9, 12, 16

 A) 9 B) 12 C) 16 D) 8

Explanation:

The given sequence is a combination of three series:
i)1st, 4th, 7th terms i.e, 2, 4, 9
ii)2nd, 5th, 8th terms i.e, 3, 6, 12
iii)3rd, 6th, 9th terms i.e, 4, 8, 16
In each one of i, ii, iii, each term is twice the preceding term.
So, 9 is wrong and must be replaced by (4*2) = 8

503 41127
Q:

Find the next number in the series 5, 8, 16, 19, 57, 60, .....

 A) 188 B) 256 C) 240 D) 180

Explanation:

The pattern is x1+3, x 2, x1+3, x 3, x1+3, x 4

The next number=60x4=240

54 40833
Q:

Complete the given number series?

8, 14, 24, 40, ?

 A) 65 B) 84 C) 96 D) 102

Explanation:

The given number series is 8, 14, 24, 40, ? .

It follows a pattern that,

8

8 x 1.5 + 2 = 14

14 x 1.5 + 3 = 24

24 x 1.5 + 4 = 40

40 x 1.5 + 5 = 65

Hence, the next number in the given number series is 65.