Question : Directions: In the following question, select the related number from the given alternatives. 64 : 100 :: 49 : ?
Option 1: 36
Option 2: 63
Option 3: 81
Option 4: 144
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Correct Answer: 81
Solution : Given: 64 : 100 :: 49 : ?
The difference between the square root of the numbers of the given pairs is 2. Like, 64 : 100→8 2 = 64; 10 2 = 100 Similarly, for 49 : ?→7 2 = 49; 9 2 = 81
So, 49 is related to 81. Hence, the third option is correct.
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