What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

You have two rectangular wires.

Both of them have property that when you light the fire from one end , it will take 60 minutes to get completely burn.

However, they do not burn at consistent speed (i.e it might be possible 1st 20% burn in 50 minutes and 80% can burn in 10 minutes).

So how could you measure 45 minutes ?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

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

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

When we see 2 but call 10?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

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?