What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

Our product and our sum always give the same answer. Who are we?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

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

Find out the missing number in the picture attached:

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?