Question

If 5 - 4 = 23, 8 - 1= 63, 6 - 16 = 32, 9- 9 = 78, 3 - 9 = 6 then 3 - 81 = ?

Answer 1

Answer is 0(zero).

The logic is 'Square of first number minus squareroot of the second'

5^2 - squareroot(4) = 23
8^2 - squareroot(1) = 63
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.
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3^2 - squareroot(81) = 0