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1
Determine first and last digits
Determine first and last digits
Source:
May 16, 2011
Problem Statement
If
a
679
b
a679b
a
679
b
is the decimal expansion of a number in base
10
10
10
, such that it is divisible by
72
72
72
, determine
a
,
b
a,b
a
,
b
.
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