Question : Directions: Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number.
31 : 3 :: 75 : 35 :: 54 : ?
Option 1: 9
Option 2: 21
Option 3: 19
Option 4: 20
Correct Answer: 20
Solution :
Given:
31 : 3 :: 75 : 35 :: 54 : ?
For each pair, multiply the digits of the first number to obtain the second number –
Here, 31 : 3→3 × 1 = 3
And, 75 : 35→7 × 5 = 35
Similarly, follow the same pattern for 54; 5 × 4 = 20
So, 20 is the missing number in the given set of numbers. Hence, the fourth option is correct.
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