On his study hall November 2011 he gave these 2 problems which I could not solve :
a) If a and b are positive integers and a/b = 87.75 b=?
25
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30
b) the set S= 6 consecutive positive integers ,positive integer n =?
1-when each integer in S is divided by n the sum of the remainders = 11
2-when each integer in S is divided by n the remainders include 5 different values
Any clues ??? thanks in advance