f(M, N) is defined as the number of ways a rectangle of size M by N can be filled by polygons with integer side lengths and angles of 90 degrees or 270 degrees.

Find (123456789, 987654321) mod 10,000,000,000

## Search found 2 matches

- Tue May 17, 2016 6:59 pm
- Forum: Geometry
- Topic: Polygons with right angles
- Replies:
**0** - Views:
**7742**

- Wed Jan 07, 2015 2:56 am
- Forum: Number
- Topic: Palindromic Repetitions
- Replies:
**4** - Views:
**9163**

### Palindromic Repetitions

A palindrome is a number that is the same way forward as it is backwards. For example, 22 is a palindrome. Clearly, however, 23 is not. But by adding 23 reversed on to itself (32), you get 55, which is a palindrome. That took 1 repetition. With 64, 1 repetition gives you 110, and since that isn't a ...