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?

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

I have branches, but no fruit, trunk or leaves. What am I?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Five thieves looted a bank and they ran away in a car. The bank staff informed the police and they began the search of their car in their jeep. They found them on a road and chased them eventually catching them. The light that is used to fill the number plate was broken on the thieves' car. Also, the headlights of the jeep police were not working. How were the police able to catch the thieves then?

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

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Can you name an animal whose killing cannot be performed without spilling your own blood?