Putnam 2013 A1

Putnam Mathematics Putnam 2013
#1

A1

#2

Putnam_2013_A1
Putnam_2013_A1738×216 17.7 KB

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#3

Here is the method I used :slight_smile:

image
image1273×604 32.7 KB

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#4

image

#5

Enigma also solved the problem in the post above mine.

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#6

Thx