Number Series Questions

Q:

What should come in place of question mark (?) in the following question?

600 + 300 ÷ 15 = ? × 31

A) 18 B) 25
C) 40 D) 20
 
Answer & Explanation Answer: D) 20

Explanation:

As per the BODMAS rule, Addition and subtraction can be treated on same priority (from left to right) when they are in consecutive order. 600 + (300/15) = ? × 31 600 + 20 = ? × 31 ? = 620/31 = 20

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1 59404
Q:

Find the wrong number in the series.

3, 8, 15, 24, 34, 48, 63

A) 15 B) 24
C) 34 D) 48
 
Answer & Explanation Answer: C) 34

Explanation:

The difference between consecutive numbers of the given series are respectively 5, 7, 9, 11, 13, and 15.

Therefore, 24+11=35 But in your problem it is given as 34.so 34 is wrong number

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360 59059
Q:

1, 2, 3, 10, ?, 9802

A) 99 B) 199
C) 299 D) 999
 
Answer & Explanation Answer: A) 99

Explanation:

2 = 12 + 13 = 22 - 110 = 32 + 1Now 102 - 1 = 999802 = 992 + 1

 

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838 56073
Q:

What is the next number of the following sequence ?

21, 77, 165, 285, ......

A) 404 B) 415
C) 426 D) 437
 
Answer & Explanation Answer: D) 437

Explanation:

The series follow the rule,

 


21 = 
77 = 92-4
165 = 132-4
285 = 172-4


5,9,13,17,21,(+4)...
In the same way next no. will be
212-4 = 441 - 4 = 437

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50 55713
Q:

In the following question, select the missing number from the given series.
 
102, 85, 68, 51, ?

A) 34 B) 40
C) 37 D) 31
 
Answer & Explanation Answer: A) 34

Explanation:
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0 48468
Q:

Find the missing number in the following series?

2, 3, 10, 39, ?, 885

A) 128 B) 156
C) 172 D) 189
 
Answer & Explanation Answer: C) 172

Explanation:

Take a Look at the below sereies

2×1+12=3

3×2+22=10

10×3+32=39

39×4+42=172

172×5+52=885

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74 45932
Q:

Find the missing number in the given series ?

15, 51, 216, 1100, ?, 46452

A) 5660 B) 6560
C) 6750 D) 6630
 
Answer & Explanation Answer: 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.

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50 45665
Q:

What letters will fill the blank?

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

A) M, N B) P, N
C) O, K D) K, S
 
Answer & Explanation Answer: B) P, N

Explanation:

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

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