When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

I know a nine-letter word having only one vowel.
Do you ?

How many bananas can you eat if your stomach is empty?

Make a sentence consisting of three words that have the whole alphabet.

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

If your uncle’s sister is not your aunt, what relation is she to you?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?