How many sides does a circle have?

When can we add 2 to 11 and get 1 as the correct answer?

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?

If an electric train is travelling south, then which way is the smoke going?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

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?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

I am the first thing you need while camping.
I am always with the person named Marcos Valencia and Carrick.
But Pogba Zlatan and Rooney think I am wasteful and do not need me.
I am the second to the last thing to add when you are making a patch.

What am I?