An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

Can you replace the question mark with the correct number?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Move four matchsticks to the below square to form three squares?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

Prove that twice of ten is the same as twice of eleven.

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