I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

How is the moon similar to a dollar?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

You are given 16 witch hats. The hats are divided in four different colours – red, blue, green and yellow. Every colour has been assigned to four hats. Now each of the hat will be glued with a label of an arithmetic sign – ‘+’, ‘-‘, ‘x’ or ‘/’. But you can label one sign only once on one colour. In such an arrangement, the hats can be uniquely defined by its colour and symbol.

Can you arrange all the 16 hats in a 4x4 grid in a fashion that no two rows and columns have a repetition of colour or sign?
We have arranged four hats in the below picture to assist you.

What is the next number?

77, 49, 36, 18 ?

Can you replace the question mark with the correct number?

What has lots of eyes, but can’t see?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?