Number Series Questions

Q:

What will come in place of the question mark (?) in the following number series?

312      231      295      ?      282      257

A) 210 B) 25
C) 246 D) 279
 
Answer & Explanation Answer: C) 246

Explanation:

The series follows a pattern that,

-92, +82, -72, +62, -52

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43 18514
Q:

Find the wrong number in the following series?

1500, 1475, 1448, 1419, 1389, 1355, 1320

A) 1475 B) 1419
C) 1389 D) 1355
 
Answer & Explanation Answer: C) 1389

Explanation:

Take a look at the below sereies :

1500 - 25 = 1475

1475 - 27 = 1448

1448 - 29 = 1419

1419 - 31 = 1388

1388 - 33 = 1355

1355 - 35 = 1320

It clearly shows 1389 is Wrong Number

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20 18453
Q:

Look at the series :

3, 7, 24, 11, __, 19, 19,... What number should fill the blank ?

A) 15 B) 13
C) 21 D) 16
 
Answer & Explanation Answer: A) 15

Explanation:

Two series alternate here, with every third number following a different pattern.
In the main series, 4 is added to each number to arrive the next.
In alternate series, 5 is subtracted from each number t arrive the next number.
Here in the main series
3 + 4 = 7
7 + 4 = 11
11 + 4 = 15
15 + 4 = 19

In alternate series
24 - 5 = 19
19 - 5 = 14...

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22 18357
Q:

In the following question, various terms of an alphanumerical series are given with one or more terms missing as shown by (?).Choose the missing terms out of the given alternatives. 2Z5, 7Y7, 14X9, 23W11, 34V13, ?

A) 47U15 B) 47V14
C) 45U15 D) 27U24
 
Answer & Explanation Answer: A) 47U15

Explanation:

The first numbers increase by 5, 7, 9, 11....
The letters move one step backward.
The last numbers are consecutive odd numbers.

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349 17799
Q:

Complete the given number series?

8, 14, 24, 40, ? 

A) 65 B) 84
C) 96 D) 102
 
Answer & Explanation Answer: A) 65

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.

 

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11 17795
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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21 17683
Q:

CGE, RNP, FJH, OKM, IMK, __

 

A) JHL B) HJL
C) LHJ D) JKL
 
Answer & Explanation Answer: C) LHJ

Explanation:

Here it can be seen that it is not a continuous series.

so take alternative terms.

CGE, FJH, IMK and RNP, OKM,__

Between R and O there is a gap of two letters. so the first letter in the answer is L.Proceding like this the answer is LHJ

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13 17665
Q:

Find the next number in the given number sequence?

101, 98, 93, 86, 75, ?

A) 62 B) 68
C) 71 D) 73
 
Answer & Explanation Answer: A) 62

Explanation:

The given number sequence is 101, 98, 93, 86, 75, ?

101

101 - 3 = 98

98 - 5 = 93

93 - 7 = 86

86 - 11 = 75

75 - 13 = 62

 

Here the series follows a pattern that consecutive subtraction of prime numbers.

 

Hence, the next number in the sequence is 62.

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9 16745