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If x10 = 12145 find x

Mathematics
JAMB 2007
If x10 = 12145 find x
  • A. 124
  • B. 121
  • C. 184
  • D. 180
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Correct Answer: Option C
Explanation
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

There is an explanation video available below.

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Explanation Video

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