CTS Complete The Series Sample Problems

Dear Reader, Below are 4 easy questions. In each of these questions you have to find a missing number.

Question 1

What number should come at the place of question mark ?
16, 136, 1096, ?

a) 4998 b) 6884 c) 8776 d) none of these

Answer : c) 8776

Solution :

(16 x 8) + 8 = 136
( 136 x 8) + 8 = 1096
(1096 x 8) + 8 = 8776

Question 2

Find the number that should replace the question mark.
4200, 1680, 672, ?

a) 268.8 b) 324.8 c) 242.8 d) 122.8

Answer : a) 268.8

Solution :

4200/2.5 = 1680
1680/2.5 = 672
672/2.5 = 268.8

Question 3

What is the number that will come in the place of question mark?
14, 28, 112, ? , 5376, 53760

a) 448 b) 224 c) 336 d) none of these

Answer : d) none of these.

Solution :

14 x 2 = 28
28 x 4 = 112
112 x 6 = 672
672 x 8 = 5376
5376 x 10 = 53760. Hence answer is d) none of these - in that place 672 should come.

Question 4

Which number should replace question mark?
25, 168, ? , 8176

a) 6176 b) 9176 c) 7776 d) 8176

Answer : d) 8176

Solution :

(25 x 7) - 7 = 168
(168 x 7) - 7 = 1169
(1179 X 7) - 7 = 8176

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