Maron Posted May 23, 2006 Posted May 23, 2006 Find all two digit-numbers N such that N+2 is also a two-digit number and the digit sum of N+2 is less than the digit sum of N. Help Would be apreciatted. Thank You
timo Posted May 23, 2006 Posted May 23, 2006 Those with an 8 or 9 as the last digit seem highly suspicious to me.
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