Name a key which is hardest to turn.

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

When can we add 2 to 11 and get 1 as the correct answer?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

In the image given, you can find several triangles. Can you count them all?

Identify the 10 differences between the two given pictures.

What is the riddle which can be asked all day with a different correct answer each time.