I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

What goes up but never comes down?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

What is full of holes but still holds water?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Can you find a rabbit in the given picture?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?