What word begins and ends with an E, but has only one letter?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

What does the below rebus riddle means?

By using 'because' continuously three times, can you make an English statement ?

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

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

which number am I?

The more of this there is, the less you see. What is it?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

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?

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?