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

What you cannot hold but it is yours?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

Solve the puzzle by telling what does below picture means.

Count the number of triangles in the below picture?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

Can you find the thief by just looking at the picture below?