Brain Teaser #75

[Greg Bernhardt]

Can you find the largest number possible containing any of 9 of 10 digits, considering 0 also a number, that is divisible by 11 without a reminder?

[Guybrush Threepwood]

is it 9999999999?

[Njorl]

Originally posted by Greg Bernhardt
Can you find the largest number possible containing any of 9 of 10 digits, considering 0 also a number, that is divisible by 11 without a reminder?

That doesn't make sense.

Njorl

[Njorl]

nm

[dduardo]

The wording is a bit strange, but I think I got it. I did a brute force attack on this problem. Starting at 999999999 and decrementing by 1 each time, I did a modulus 11 and checked if the result was 0. Here is what I got:

999999990

or if you can only use each digit once it is

987652413

[Greg Bernhardt]

987652413 is the answer, dduardo gets the point! :)

[Jimmy]

doh! I always see these when it's too late. [6)]