How can a man go eight days without sleep?

What is the next shape from answers A, B, C, and D figure?

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

What has a bottom at the top?

Solve the following series:
AZ, GT, MN, __, YB

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

Make a sentence consisting of three words that have the whole alphabet.