If x10 = 12145 find x

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Mathematics JAMB 2007

If x10 = 12145 find x

  • 124
  • 121
  • 184 checkmark
  • 180

The correct answer is: 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 .

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