How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Can you find out the missing number in the grid?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

What is the largest number you can write with just 3 digits?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

What does this simple rebus mean?

The more of this there is, the less you see. What is it?

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?

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?