You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?
You knock a Table over in the library, and suddenly 20 eyes are looking at you.
What demands an answer, but asks no questions
I have a clock(12-hour format) and both the needles of the clock overlap at 12:00. After how much time, they will overlap again?
I am a white box having no key or lid. Yet there is a golden treasure inside it. What Am I?
Can you find the missing piece of the Porsche?
What is the riddle which can be asked all day with a different correct answer each time.
A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?
What can go up a chimney down, but can't go down a chimney up?
Kids with the most attentive eyes can spot a different watermelon in 4 seconds. Can you? Test your eyes now!
It can be easily calculated that the digits 0 to 9 can be arranged into 3628800 distinct ten-digit numbers. But do you know how many of these numbers are prime?
In Canada, a mathematical puzzle must be solved in order to win the lottery to classify it as a “game of skill” not gambling.
