Given that 2^29
is a nine-digit number all of whose digits are distinct,
determine which of the ten digits is
Provide your answer without computing the actual number.
Source: SMO contest
(In reply to re(2): Solution
lol, yeah, didn't think of the power of 2 thing. When I read proofs/solutions I tend to see the logic/reasoning in my head in a much more general manner and thus some of the obvious assumptions like that get lost to me.
Posted by Daniel
on 2015-06-09 13:33:51