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MATHEMATICS

JAMB 2007 - Question 29

Mathematics 2007 JAMB Past Questions - Question 29: If x10 = 12145 find x

If x10 = 12145 find x

A: 124

B: 121

C: 184

D: 180

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Correct Answer

Explanation

x10 = 12145= x10 = 1 x 5^3 + 2 x 5^2 + 1 * 5^1 + 4 x 5^0= 1 x 125 + 2 x 25 + 1 x 5 + 4 x 1= 125 + 50 + 5 + 4= 184