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

What does this Rebus Picture mean?

What has many teeth, but cannot bite?

What Adam and Eve do not have but the rest of the people have?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What does an Island and the letter T have in common?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

Can you count the number of blocks in the picture below?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?