Can you solve below mathematical equation?

2^1234 - 2^1233

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

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

I throw two dice simultaneously.

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

On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.

Can you tell me how many 20-paisa and 25-paisa he got?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?