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?

Can you count the number of squares in the figure below?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test paper it was a blank sheet of paper with a solitary question on it: 'What is the risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

What 5-letter word typed in all capital letters can be read the same upside down?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?