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?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

What month of the year has 28 days?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

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

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

what one word does the below rebus identifies?