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SSC CGL Model Paper 1

Question : 18 of 100

Marks: +1, -0

If 18 (9) 3 and 36 (30) 5, then what is the value of A in 19 (A) 18?

Solution:

Concept:

The middle number follows a fixed rule using the two outer numbers.

Explanation:

For

18\ (9)\ 3

(18 \times 3) \div 6 = 54 \div 6 = 9

For

36\ (30)\ 5

(36 \times 5) \div 6 = 180 \div 6 = 30

Apply the same rule to

19\ (A)\ 18

A = (19 \times 18) \div 6 = 342 \div 6 = 57

Answer:

A = 57

, so the correct option is B.

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