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

In the given picture, in how many ways can you read the word "Tiger"?

Use the digits from 1 up to 9 and make 100.

Follow the rules.
=> Each digit should be used only once.
=> You can only use addition.
=> For making a number, two single digits can be combined (for example, 4 and 2 can be combined to form 42 or 24)
=> A fraction can also be made by combining the two single digits (for example, 4 and 2 can be combined to form 4/2 or 2/4)

Question: how can we do this?

What goes up but never comes down?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

A woman named Maria was at the funeral of her mother. She met a nice young man that she had never seen before and after the service, they spent a bit of time together. Then she got busy and didn’t get his name or phone number before he left. She tried to find him, but no one knew who he was or how to contact him. A few weeks later, Maria’s older sister dies and the police suspect murder. Who killed the sister?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?