If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Which is heavier: a ton of bricks or a ton of feathers?

In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

During an experiment, a guy throws a bouncy ball from a 100 feet tall building. The ball has a specific characteristic. Every time it hits the ground, it bounces up halfway.

How many bounces do you think the ball will make before it comes to a stop ?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

A man dies of old age on his 25 birthday. How is this possible?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?