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

How many times can you subtract the number 5 from 25?

With the help clues provided in the image, can you find the 5 digit key?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

What is the word or phrase?

John and his team plan to rob a safe. They got just one chance to break the code else the local police will be informed. Below are clues:
A) Exactly one number is perfectly placed: 9 8 1
B) Everything is incorrect: 9 2 4
C) Two numbers are part of the code of the safe but are wrongly placed: 0 9 3
D) One number is part of the code of the safe but is wrongly placed: 1 4 7
E) One number is part of the code of the safe but is wrongly placed: 7 8 3

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

Who is that with a neck and no head, two arms and no hands? What is it?