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Quant Problem

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
Expert replies
by sukh » Tue Oct 25, 2011 6:04 am
If a 5-year construction project is structured to double the investment every succeeding year, what percentage of the total cost was invested in the first year?

(A) 12.5% (B) 10% (C) 8.25% (D) 5% (E) 3%

Answer is E why it isnt 6% becoz we divide 1 by 16 - 16 being investment in 5th year
Last edited by sukh on Tue Oct 25, 2011 6:18 am, edited 1 time in total.
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Source: — Quantitative Reasoning |

by shankar.ashwin » Tue Oct 25, 2011 6:08 am
x + 2x + 4x + 8x + 16x = 100
31x = 100
x ~ 3 (Here 'x' is the investment in the first year')

E
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