There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

You walk into a creepy house by yourself. There is no electricity, plumbing, or ventilation. Inside you notice 3 doors with numbers on them. Once you open the doors you will die a particular way. Door No.1 You’ll be eaten by a lion who is hungry. Door No.2 You’ll be stabbed to death. Door No.3 There is an electric chair waiting for you. Which door do you pick?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

Find the smallest sentence with all the English alphabet.

How can you make number one disappear by adding something to it?

Who can jump higher than a Mountain?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

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 ?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10