Question : Directions: Select the option that is related to the third number in the same way as the second number is related to the first number.
64 : 512 :: 81 : ?
Option 1: 727
Option 2: 730
Option 3: 728
Option 4: 729
Correct Answer: 729
Solution :
Given:
64 : 512 :: 81 : ?
Like, 64 : 512→64 × √(64) = 64 × 8 = 512
Similarly, follow the same pattern for 81 : ?→81 × √(81) = 81 × 9 = 729
So, 729 is the required answer. Hence, the fourth option is correct.
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