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1
I.S.I. B.Math.(Hons.) Admission test : 2010 Problem 1
I.S.I. B.Math.(Hons.) Admission test : 2010 Problem 1
Source:
April 10, 2012
floor function
modular arithmetic
calendar
Problem Statement
Prove that in each year , the
1
3
t
h
13^{th}
1
3
t
h
day of some month occurs on a Friday .
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