Unformatted text preview: d ± ± ( aa 1 + a 2a 3 + ··· + (1) l a l ) . 5. (a) Prove that a positive integer is divisible by 8 if and only if the threedigit integer formed by its ﬁnal three digits is divisible by 8. (b) Determine all pairs of digits ( a,b ) such that 27 b 9 a 4 is divisible by 72. 1...
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This note was uploaded on 07/24/2011 for the course MATH 135 taught by Professor Andrewchilds during the Winter '08 term at Waterloo.
 Winter '08
 ANDREWCHILDS
 Math

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