There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

A swan sits at the center of a perfectly circular lake. At an edge of the lake stands a ravenous monster waiting to devour the swan. The monster can not enter the water, but it will run around the circumference of the lake to try to catch the swan as soon as it reaches the shore. The monster moves at 4 times the speed of the swan, and it will always move in the direction along the shore that brings it closer to the swan the quickest. Both the swan and the the monster can change directions in an instant.
The swan knows that if it can reach the lake's shore without the monster right on top of it, it can instantly escape into the surrounding forest.

How can the swan successfully escape?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

How could a baby fall out of a twenty-story building onto the ground and live?

Find the next number in the sequence

5 12 24 36 ?

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?

what does the below rebus means?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?