You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

What does this Rebus Picture means ?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

We have arranged an array of numbers below. What you have to do is use any kind of mathematical symbol you know excluding any symbol that contains a number like cube root. You can use any amount of symbols but you have to come up with a valid equation for all of them.

0 0 0 = 6
1 1 1 = 6
2 + 2 + 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?