How many sides does a circle have?

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

which number am I?

There are five men, let's say Tarun Harish Lavesh, Manoj, and Manish. All of them have a dot mark on their forehead. They can't see the dots on their forehead but can see the ones on others. The owner of WHITE Dot is an honest person and will never lie, while the owner of BLACK Dot always tells the lie.

This is the statement from Tarun Harish Lavesh and Manish:
Tarun: 'I see 3 whites and 1 black'
Harish: 'I see 4 black'
Lavesh: 'I see 3 black and 1 white'
Manish: 'I see 4 white'

What colour is the dot on each of Tarun Harish Lavesh, Manoj, and Manish's forehead?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

What happened when the wheel was invented?

What can you hold in your right hand, but never in your left hand?

Below rebus represent famous DiCaprio movie. Can you name it?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Why did Navjot Singh Sidhu put the new January calendar in the freezer

On a windy rainy night , I was driving in my car.
When i reach the bus stand , i see three people waiting for the bus.

1. An old lady who needs an immediate medical attention
2. My Best Friend
3. Girl whom i love from childhood

My car is a two seat, so can you tell me , what i have done in this situation ?