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

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

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

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?