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Compute (5C1+5C2+5C3) * (6C2+6C3+6C4)

 May 14, 2018
 #1
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Combinations!

(51)+(52)+(53)5+10+10=25

(62)+(63)+(64)=15+20+15=50

Thus, 5025=1250

smileysmiley

 May 14, 2018

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