Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Replace the question mark with the correct number in below Picture:

How many triangles are there on the puzzle below?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?