Question : Directions: In the following question, select the related number from the given alternatives.
85 : 42 :: 139 : ?
Option 1: 68
Option 2: 69
Option 3: 70
Option 4: 67
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Correct Answer: 69
Solution :
Given:
85 : 42 :: 139 : ?
Subtract 1 from the first number and then divide it by 2 to obtain the second number.
Like, 85 : 42→(85 – 1) ÷ 2 = 84 ÷ 2 = 42
Similarly, follow the same pattern for 139 : ?→(139 – 1) ÷ 2 = 138 ÷ 2 = 69
So, 139 is related to 69 . Hence, the second option is correct.
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