1 Answers

Option 3 : 2 : 7

The pattern is in the form of x : x3 - 1.

Now,

99 ≠ 103 - 1

65 ≠ 83 - 1

7 = 23 - 1

729 ≠ 93 - 1

Hence, 2 : 7 is the correct answer.

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