The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

I throw two dice simultaneously.

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

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test paper it was a blank sheet of paper with a solitary question on it: 'What is the risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

What do you see in the image below