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

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Can you find out the remainder when 3^300 is divided by 5?

Akbar summoned Birbal out of anger.
He told him that he will have to face death.
He asked him to make a statement and if the statement is true he will be buried alive and if the statement is false, he will be thrown at lions.
After hearing Birbal’s statement, Akbar could do nothing but smile.
He gave him 5 gold bars and let him go.

What did Birbal say?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

What occurs twice in a week, once in a year but never in a day?

There is a jar in which there are two types of candies.
20 blueberries and 16 strawberries. You perform the following steps:
1) You take out two candies.
2) If the two candies are of the same flavour, you add a blueberry one otherwise, you add the strawberry one.

You repeat these two steps till there is just one candy remaining in the jar. Which flavoured candy will be left?

There are three Athletes (John, Tarun and Harish) and their individual Coaches (Jacob, Meenaxi and Priyanka) standing on the shore.
No Coach trusts their Athlete to be near any other Coach unless they are also with them.
There is a boat that can hold a maximum of two persons.
How can the six people get across the river?

What does it mean?

What is always in front of you but can’t be seen?