How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

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

Which is heavier: a ton of bricks or a ton of feathers?

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?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

What does this rebus riddle mean?

How many times can you subtract the number two from the number fifty?

Can you find out who is the kidnapper in below Picture and why, Explain ?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?