What does the below rebus riddle means?

A dying old man wants to divide his entire land between his only two sons. Since his only wish is to treat them as equal as both of them have been too good to him, he wants to divide his land equally between them. The problem is that the land is significantly irregular in shape and thus there is no choice of cutting them into two equal halves.

Can you help him divide the land in a manner that both of his sons will be happy?

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

Why is the Hole below a Lock?

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

Below rebus represent famous DiCaprio movie. Can you name it?

A man was found murdered on Sunday morning. His wife immediately called the police. The police questioned the wife and staff and got these alibis: The Wife said she was sleeping. The Cook was cooking breakfast. The Gardener was picking vegetables. The Maid was getting the mail. The Butler was cleaning the closet. The police instantly arrested the murderer. Who did it and how did they know?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

When is the top of a mountain similar to a savings account?

What number do you get when you multiply all of the numbers on a telephone's number pad?