If eleven plus two equals one, what does nine plus five equal?

Can you decipher the two rows to find the hidden word?

Take one out and scratch my head, I am now black but once was red. What am I?

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Find the number of squares in the below-given picture.

This is a famous paradox which has caused a great deal of argument and disbelief from many who cannot accept the correct answer. Four balls are placed in a hat. One is white, one is blue and the other two are red. The bag is shaken and someone draws two balls from the hat. He looks at the two balls and announces that at least one of them is red. What are the chances that the other ball he has drawn out is also red?

What goes up but never comes down?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

What question can you never answer yes to?