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MATHEMATICS

JAMB 2011 - Question 29

Mathematics 2011 JAMB Past Questions - Question 29: If 2q35 = 778, find q

If 2q35 = 778, find q

A: 1

B: 2

C: 4

D: 0

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Correct Answer

Explanation

2q35 = 7782 x 5^2 + q x 5^1 + 3 x 5^0 = 7 x 8^1 + 7 x 8^02 x 25 + q x 5 + 3 x 1 = 7 x 8 + 7 x 150 + 5q + 3 = 56 + 75q = 63 - 53q = 10/5q = 2