Sums Of 10

How many ways are there of adding together two or more integers from 11 to 99 to make 1010? For example, 1+9=101+9=10, 9+1=109+1=10, 2+8=102+8=10, 8+2=108+2=10, and 2+1+2+1+1+2+1=102+1+2+1+1+2+1=10. (Sums that contain the same numbers but in a different order are considered to be different.)

×

Problem Loading...

Note Loading...

Set Loading...