Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

What does this rebus puzzle means ?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

What do you think with the below Picture ?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Find the missing number in the sequence below:

What number divided by 4 is the same as that number minus 4?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211