I am an odd number. Take away a letter and I become even. What number am I?

What is red and smells like blue paint?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

What does the below image rebus riddle means ?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

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

which number am I?