How many sides does a circle have?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

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

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

On a bright sunny day, two fathers took their son fishing in the lake. Each man and son were able to catch one fish. When they returned to their camp, there were only three fishes in the basket. What happened?

PS: None of the fish were eaten, lost, or thrown back.

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.