Question :
Directions: In the following question, select the related number from the given alternatives.
42 : 20 :: 64 : ?
Option 1: 31
Option 2: 32
Option 3: 40
Option 4: 42
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Correct Answer: 31
Solution :
Given:
42 : 20 :: 64 : ?
The pattern is as follows –
Like, 42 : 20→(42 ÷ 2) – 1 = 21 – 1 = 20
Similarly, follow the same pattern for 64 : ?→(64 ÷ 2) – 1 = 32 – 1 = 31
So, 64 is related to 31. Hence, the first option is correct.
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