How do you go from 98 to 720 using just one letter?
'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?
What's the next in the series? H, Be, F, S, Mn, Kr, In, Gd, Tl, ?
The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery. What is the chance of Mr John now?
The first box has two white balls. The second box has two black balls. The third box has a white and a black ball. Boxes are labeled but all labels are wrong! You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball. How many such operations are necessary to correctly label the boxes?
It belongs to you, but other people use it more than you do. What is it?
I have feet, but no legs. Which animal Am I?
When monkey rotate the gear, which mark will be hit 1 or 2 ?
Can you count the number of lines in the below picture?
What jumps when it walks and sits when it stands?
How many bananas can you eat if your stomach is empty?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
