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More than one way to skin a cat (Posted on 2010-03-24) |
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You start with a zero and try to reach exactly 100 in 4 stages, each stage consisting of either increasing or decreasing your current number by a factorial n!( number like 1,2,6,24,120,720 etc) . How many sequences exist to accomplish this task?
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Submitted by Ady TZIDON
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Solution:
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(Hide)
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ans:36
sol: a)24, 2, 2 and 120(12 permutations)
b) -24, -2, 6 and 120 (24 permutations). |
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