Friday, October 29, 2010

3-digit numbers

Write any three-digit number whose first digit differs from its last by 1.

E.g. 314, 647, 738, etc.

Now, reverse the digits then subtract the smaller from the larger number:

413 - 314 = 99
746 - 647 = 99
837 - 738 = 99

Does this always happen?

Posted by at

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)