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 ?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

What kind of band never plays music?

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