These are old, but they are still fun for those that have not seen them before.

1. Three guys go out for a bite to eat, they each have R10. The bill comes to R25 and each fella hands his R10 to the waiter. On his way back to the table with the R5 change the waiter thinks, "R5 does not divide easily into three, I will put R2 in my pocket", he does this and gives each of the fellas R1 change. Here's the calculation:

Each fella has paid R10(original funds) minus R1(change) = R9(total)
3(fellas) multiplied by R9 = R27(total paid for meal)
R27 + R2(waiters pocket tip) = R29
Where is the missing R1?

2. If a hunter starts walking Due South from his house for 5Km and shoots a bear, he turns Left 90Deg. and walks a further 5Km, where he shoots another bear. He turns Left 90Deg. and walks a further 5Km and is back at his home.
Where does he live?
What colour are the bears?

More to follow...