Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

Name a key which is hardest to turn.

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

I throw two dice simultaneously.

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

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?