What does this simple rebus mean?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

What number do you get when you multiply all of the numbers on a telephone's number pad?

A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

What Adam and Eve do not have but the rest of the people have?

Why is the Hole below a Lock?

Three men in a cafe order a meal the total cost of which is $15. They each contribute $5. The waiter takes the money to the chef who recognises the three as friends and asks the waiter to return $5 to the men.

The waiter is not only poor at mathematics but dishonest and instead of going to the trouble of splitting the $5 between the three he simply gives them $1 each and pockets the remaining $2 for himself.

Now, each of the men effectively paid $4, the total paid is therefore $12. Add the $2 in the waiters pocket and this comes to $14. Where has the other $1 gone from the original $15?

What do you see in the given picture?

Can you solve below mathematical equation?

2^1234 - 2^1233