Math Contest- Week #1

This is a weekly Math Contest in which I will post a math question each week. You will have until Friday to answer. I will be giving the answers back usually on Mondays (i'll try my best to).
PRIZES!!!
YES there are prizes to this thing =]. If you are the first one to answer correctly I will read, vote and comment on 5 of your poems! maybe not right away on Monday but throughout the whole week.

I hope that you'll enjoy this math contest!!

~CaM~

BTW The questions will be taken form books, internet or myself/other people...=]

Question for Week 1

There are 2 sets A and B, which have 3 and 5 elements in each respectively.Then, what is the number of injections (i.e. one-to-one mappings) from set A to set B?

1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 :) do I win? lol sorry horrible at math, that's how I answer all my tests

15

one to one mappings....I hope I remebered it correctly

The mappings whoswhat?

I dunno, 8?

haha 64?

Should be 15

This is easy. I wish I had arrived earlier to give the answer: 15 (5 x 3).

6