There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

How many words can a pen with half refill write?

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day