olymmath

OSN 2004 Problem 3

  • Day 1

In how many ways can we change the sign ∗* with ++ or −- , such that the following equation is true? 1∗2∗3∗4∗5∗6∗7∗8∗9∗10=291 *2*3*4*5*6*7*8*9*10=29

Dataset text AI-MO AoPS. Quoted with source.

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