Number Series Questions

Q:

Pick the odd one out from the given number series?

21, 24, 33, 49, 74

A) 21 B) 24
C) 33 D) 49
 
Answer & Explanation Answer: A) 21

Explanation:

The given number series follows a pattern that,

19 + 12 = 20 (not 21)20 + 22 = 2424 + 32 = 3333 + 42 = 4949 + 52 = 74 

 

Hence, the odd number in the given number series is 21.

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18 27897
Q:

Find the next number in the given number series?

2, 3, 7, 16, 32, ?

A) 49 B) 52
C) 54 D) 57
 
Answer & Explanation Answer: D) 57

Explanation:

The given number series is 2, 3, 7, 16, 32, ?

 

22 + 12 = 33 + 22 = 77 + 32 = 1616 + 42 = 3232  + 52 = 57

Hence, the next number in the given number series is 57.

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21 27699
Q:

prp  qrp  prr  pqr  qrp  rpr  qqr  rpr  qpr  qrr qpr  qpr

If every third letter starting from the left is replaced by a number beginning with 1 then which letter/ number will be 16th from the right?

A) q B) r
C) 6 D) 7
 
Answer & Explanation Answer: D) 7

Explanation:

New sequence is as follows:

pr1  qr2  pr3  pq4  qr5  rp6  qq7  rp8  qp9  qr10  qp11  qp12

16th from the right  end is 7

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21 27689
Q:

Choose the missing terms in the given series from the four alternatives given below.

C, E, G, J, M, Q, ?

A) T B) U
C) P D) V
 
Answer & Explanation Answer: B) U

Explanation:

The letters move 2, 2, 3, 3, 4, 4, ... steps forward.

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15 27493
Q:

Next number in the number sequence is

22, 11, 33, 16.5, 49.5, ?

A) 24.75 B) 41
C) 33.5 D) 26.75
 
Answer & Explanation Answer: A) 24.75

Explanation:

The given number series is 22, 11, 33, 16.5, 49.5, ?

22

22 / 2 = 11

11 x 3 = 33

33 / 2 = 16.5

16.5 x 3 = 49.5

49.5 / 2 = 24.75

 

Hence, the next number series is 24.75.

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15 26699
Q:

In the folowing questions pickout the most sutiable substitute for the question mark?

6 : 222 :: 25 : ?

A) 650 B) 15625
C) 15650 D) 15600
 
Answer & Explanation Answer: C) 15650

Explanation:

63+6=222 

Similarly , 253+25=15650

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30 26565
Q:

Which digits will come in the place of '?' in the following series ?

372, 823, 644, 582, 46?, 8?7

A) 4, 4 B) 6, 2
C) 3, 2 D) 2, 5
 
Answer & Explanation Answer: B) 6, 2

Explanation:

Given series is 372, 823, 644, 582, 46?, 8?7

Here the series follow the rule that :
372 = 3+7+2 = 12
823 = 8+2+3 = 13
644 = 6+4+4 = 14
582 = 5+8+2 = 15
46? = 4+6+? = 16 => ? = 6
8?7 = 8+?+7 = 17 => ? = 2

So the missing numbers are 6 and 2

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34 26397
Q:

Find the next number in the given number series?

10, 6, 8, 15, ?

A) 34 B) 24
C) 28 D) 30
 
Answer & Explanation Answer: A) 34

Explanation:

The given number series is 10, 6, 8, 15, ?

10

10 x 0.5 + 1 = 6

6 x 1 + 2 = 8

8 x 1.5 + 3 = 15

15 x 2 + 4 = 34

 

Hence, the next number in the given series is 34.

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12 26249