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Exam Questions Papers - Engineering

Q1:

If (225)Y = (165)8 find value of Y

A 7

B 8

C 9

D 11

ANS:A - 7

(225)y => 2Y2 + 2Y + 5 = (165)8 => (117)10 ∴ 2Y2 + 2Y + 5 = 117 Y2 + Y - 56 = 0 ∴ Y = 7 or Y = - 8 ∴ Y should be 7.