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?

I am white when I am dirty, and black when I am clean. What am I?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

What is the end of everything?

You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

You have a thousand Re. 1 coins with you. You have ten bags with you and you can put any number of coins in each of the bags. The condition is that if someone asks you for any amount between 1 and 1000, you must be able to give that amount by just giving the bag (you are not allowed to open the bag and give coins).

How will you do it?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

What Adam and Eve do not have but the rest of the people have?

What word does this rebus represent?

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