Mathematics
5 questions in Mathematics, free to read.
- How many distinct ways can you rearrange all the letters of the word BOOKKEEPER?
- In how many ways can 5 people exchange letters (each mails to one of the others) so that nobody receives their own lett…
- How many integers from 100 to 200 (both endpoints included) are divisible by 9?
- Using the standard mathematical convention where the result is the least nonnegative residue, what is -17 mod 5?
- At a party of 8 people, everyone shakes hands with every other person exactly once. How many handshakes occur in total?