What is the coolest letter in the alphabet?

How is the moon similar to a dollar?

You are given 2 eggs.
You have access to a 100-storey building.
Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor, Both eggs are identical.
You need to figure out the highest floor of a 100-storey building an egg can be dropped without breaking.
Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

A rain drop fell from one leaf to another leaf and lost 1/4th of its volume. It then fell to another leaf and lost 1/5th of the volume. It again fell on another leaf and lost 1/5th of the volume.



This process kept repeating till it fell on the last leaf losing 1/75th of its volume.



Can you calculate the total percentage of loss from the initial volume when the drop has fallen to the last leaf accurate up to two decimal places?

What is at the end of a rainbow?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?