A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it. How can he do that?
John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?
What number should come in place of the question mark below?
You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth. How long would it take for the machine to cut the roll if each cut took 4 secs?
Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3. (You can use one number only once)
No matter how little or how much you use me, you change me every month. What am I?
There was a strange boy who was born before his father. How can this be possible?
Count the number of triangles in the given picture.
What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?
What is full of holes but still holds water?
A sundial has the fewest moving parts of any timepiece. Which has the most?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.