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 ?

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

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

Whats the next number in the below number sequence pattern.

What common phrase is represented by the below lines

Easy going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Medium going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Tough going:
Weak, 'I can't do it, I'm staying!'
Tough, 'Let's get going.'

I’m tall when I’m young, and I’m short when I’m old. What am I?

Count the number of triangles in the below picture?

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?

How can you make number one disappear by adding something to it?

It belongs to you, but other people use it more than you do. What is it?