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SSC CGL Model Paper 1

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Question : 19 of 100

Marks: +1, -0

In the following question, select the number which can be placed at the sign of question mark (?) from the given alternatives.

53
59
56
66

Solution:

Concept:

Each term is obtained by multiplying the previous term by

3

.

Explanation:

Let the missing number be

x

.

The given numbers follow the pattern:

168 \times 3 = 504

and

504 \times 3 = 1512

.

So, the first number must satisfy

x \times 3 = 168

.

Thus,

x = \frac{168}{3} = 56

.

Check:

56 \times 3 = 168

,

56 \times 3^2 = 504

,

56 \times 3^3 = 1512

.

Answer:

The required number is

56

.

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