Question : Directions: In the following question, select the related number from the given alternatives. 42 : 20 :: 64 : ?
Option 1: 32
Option 2: 33
Option 3: 34
Option 4: 31
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Correct Answer: 31
Solution : Given: 42 : 20 :: 64 : ?
Subtract 1 from the half of the first number to obtain the second number. 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 fourth option is correct.
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