What goes up but never comes down?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

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.

Which number comes next in the number series?

2, 9, 30, 93, ?