Missing Numbers Quiz Set 021

Question 1

One number is wrong in the series. Find the wrong number.

2, 3, 9, 27, 112, 565, 3396

A

565

B

9

C

112

D

27

Soln.
Ans: b

Series follows the pattern: 2 × 1 + 1 = 3, 3 × 2 + 2 = 8, 8 × 3 + 3 = 27, 27 × 4 + 4 = 112 and so on. Hence, the number 9 should be replaced by 8. So 9 is wrong.

Question 2

One number is wrong in the series. Find the wrong number.

4, 10, 23, 50, 104, 216, 439

A

4

B

10

C

23

D

104

Soln.
Ans: d

Series follows the pattern: 4 × 2 + 2 = 10, 10 × 2 + 3 = 23, 23 × 2 + 4 = 50, 50 × 2 + 5 = 105, 105 × 2 + 6 = 216 so on. Hence, the number 104 should be replaced by 105. So 104 is wrong.

Question 3

In the following number series, one of the numbers does not fit into the series. Find the wrong number.

3, 10, 36, 180, 1080, 7560, 60480

A

3

B

10

C

21

D

64

Soln.
Ans: b

Number 10 is wrong and should be replaced by 9. The series is 3 X 3 = 9, then 9 X 4 = 36, then 36 X 5 = 180, then 180 X 6 = 1080, etc.,

Question 4

Which letter will replace the question mark?

A

Y.

B

W.

C

L.

D

M.

Soln.
Ans: c

Skip one letter, then two, then three from the series: L(M)N(OP)Q, and so on.

Question 5

What is missing?

A

60.

B

30.

C

20.

D

45.

Soln.
Ans: b

(16 + 13) = (14 + 15), (28 + 12) = (10 + 30), (29 + 16) = 15 + 30.

This Blog Post/Article "Missing Numbers Quiz Set 021" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Updated on 2017-04-07.

Posted by Parveen(Hoven),
Aptitude Trainer