If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?
There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.
How many marbles are in the box?
What does below chemistry rebus means?
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 have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).
I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.
What is the probability that another side is also tail?
How can one talk without saying a single word?
There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.
81 x 9 = 801. What must you do to make the this equation true?
Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211
What work can one never finish?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.