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SSC CGL Model Paper 15

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Question : 6 of 100

Marks: +1, -0

Select the number-pair in which the two numbers are related in the same way as are the two numbers of the following number-pair?

6:108

9 : 325
10 : 495
8 : 256
4 : 34

Solution:

Concept:

The second number is obtained by cubing the first number and then dividing by

2

.

Explanation:

Given pair:

6 : 108

.

Check:

6^3 \div 2 = 216 \div 2 = 108

.

Now test the options.

9^3 \div 2 = 729 \div 2 = 364.5 \neq 325

.

10^3 \div 2 = 1000 \div 2 = 500 \neq 495

.

8^3 \div 2 = 512 \div 2 = 256

.

This matches

8 : 256

.

4^3 \div 2 = 64 \div 2 = 32 \neq 34

.

Answer:

The correct number-pair is

8 : 256

, i.e. option C.

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