Count the Triangle in the figure given below:

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?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

You can see three almost identical images below. Can you spot the odd one out from them?

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

What can you hold in your right hand, but never in your left hand?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

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 ?