I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?
Can you calculate the probability of getting a sum of six when a dice is thrown twice?
I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?
Chef Andrea has to light the kitchen stoves to open her restaurant for the day. There are three stoves in the kitchen: A glass stove, a brick stove, and a wood stove. She only has one match. Which does she light up first?
I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal. Who am I?
How many pluses should we put between the digits of 987654321 to get a total of 99, and where?
Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?
If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?
Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?
My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?
Find the last number in the series below: voN luJ yaM raM ---
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.