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?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

A person was found dead on a big green land with no trees or buildings around. When the police arrived, they found a piece of rock lying next to him and the man was wearing clothes comprising of red, blue and yellow colours.

Can you tell who the person is and what was the cause of death?

Can you count the number of quadrilaterals in the picture below?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

What four weights can be used to balance from 1 to 30 pounds?