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Question from kevin, a student:

ABCD
ABCD
ABCD
ABCD
-------
EBEA

What does each letter stand for?
I've been at it for days and still have nothing.
Thank you,
Kevin

Kevin,

  1. The sum is less than 10,000. What does this tell us about A?

  2. D+D+D+D ends in A. What do we know about A now?

  3. What values can D have? In each case, is the first digit of
    D+D+D+D odd or even?

  4. Is E odd or even? Looking at the first column, what is E?

(And so on)

Good Hunting!
RD

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