N=(abcabd) is a 6-digit number with d-c=1.

FIND N, given it is an even square.

Rem: (abcabd) denotes chaining (= concatenation), not a product

(In reply to re: two computer solutions by Ady TZIDON)

Usually what you had in mind is referred to as a "perfect" square, rather than "even" square.

Curiously my first version of the program neglected to check for being even (multiple of 2) and found the other "solutions" and I realized it before posting, unlike the case of the spurious cancellation program where I posted it with the bug in place.

Posted by Charlie on 2013-01-18 21:58:45