Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

I’m tall when I’m young, and I’m short when I’m old. What am I?

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

A man dies of old age on his 25 birthday. How is this possible?

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den

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

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

The more of this there is, the less you see. What is it?