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Home / Aptitude Tests / Mathematics / If x10 = 12145 find ...
If x10 = 12145 find x...

If x10 = 12145 find x

A.

124

B.

121

C.

184

D.

180

View answer & explanation

Correct answer is C

x10 = 12145
= x10 = 1 x 53 + 2 x 52 + 1 * 51 + 4 x 50
= 1 x 125 + 2 x 25 + 1 x 5 + 4 x 1
= 125 + 50 + 5 + 4
= 184


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