What always comes into a house through the keyhole?

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 is harder to catch the faster you run?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?

Can you find a five letter word that is left with only two letters if one is removed?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

What am I?