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

Can you count the number of triangles in the picture below?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

The more you take me, the more you leave me behind.
Who Am I?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

O_er_t_o_

Complete the missing letters of the given word.

A lion and its tamer are standing inside a cage that measures 1 unit in radius. Both of them can effortlessly run at the speed of 1 unit maximum.

1) Suppose the lion is hungry, will he be able to eat up the tamer?
2) If yes, how long can the tamer survive?