perplexus.info :: Just Math : Sum Numbers, Get Even (Digits)?

Sum Numbers, Get Even (Digits)? (Posted on 2007-08-15)

P is a 17 digit positive integer and Q is obtained by writing the digits of P backwards. If neither P nor Q has leading zeroes, can P+Q include no even digits?

Submitted by K Sengupta

Rating: 4.0000 (3 votes)

Solution: (Hide)

No. At least one digit of P+Q is always even.

EXPLANATION:

Refer to the solution submitted by Charlie in this location.

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
re: full solution	K Sengupta	2008-03-13 15:00:30
full solution	Charlie	2007-08-16 01:05:05
re(2): solution	Charlie	2007-08-15 11:55:08
re: solution	Charlie	2007-08-15 11:34:00
solution	Daniel	2007-08-15 11:17:45

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