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

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

What has many teeth, but cannot bite?

What have one eye but still cannot see?

Imagine you are in a room with no windows or doors. How will you get out?

I have feet, but no legs. Which animal Am I?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

Count the number of lines in the image below ?

Which digit occurred maximum times between the number 1 and 1000?