A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

What four weights can be used to balance from 1 to 30 pounds?

Which Travels Faster? Solve below famous picture riddle:

I don't get anymore wetter, no matter how much rain falls on me.

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

Can you find the mistake in the below statement?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

The dirtier I get, the whiter I look. Who am I?

What do you call a fish without an eye?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?