Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

John was drowned by he was not wet. How?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

What is more useful when it is broken?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

why number 8549176320 is one of a kind?

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?