How many times in a given day, minutes and hour clock comes in a straight line ?

Find the value of "?" in the ball picture Riddle below:

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

A man dies of old age on his 25 birthday. How is this possible?

There is a family that live in a round house. The two parents go out for a movie and leave a babysitter to watch their son. They come back and the kid was not there. Some one kidnapped him. The maid said she was cleaning in a corner. The cook said he was making pizza. The babysitter said she was getting a board game. Who kidnapped him.

Can you identify the Oscar-winning movie from the rebus below?

I am the fastest animal but cannot climb the tree. What am I?

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

What 5-letter word typed in all capital letters can be read the same upside down?