Problem 42418. Divisible by 16
Solution Stats
Problem Comments
-
3 Comments
Another trick: if the last 4 digits of the number are divisible by 16, the full number is divisible by 16. So far as I know, if the last X digits of a number are divisible by 2^X, the entire number is divisible by 2^X.
@James: nice trick! (and I guess the proof arises from 10^x being always exactly divisible by 2^x, so "iff" also applies?)
perhaps less interesting but I guess you could do the same with powers of 5, iff the last X digits of a number are divisible by 5^x, then the entire number is divisible by 5^x...
Problem Recent Solvers153
Suggested Problems
-
2877 Solvers
-
Flip the main diagonal of a matrix
587 Solvers
-
Create a vector whose elements depend on the previous element
487 Solvers
-
606 Solvers
-
367 Solvers
More from this Author139
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!