Others Maths Puzzle

In how many ways can 4 letters be posted in 2 post boxes, if any number of letters can be posted in all of the two post boxes?

Read Solution (Total 6)

Others Other Question

In how many ways can the letters of the vowels appear in alphabetical order when read from left to right?
Options:
1)3024
2)1024
3)126
4)720
The ratio 5:4 expressed as a percent equals: