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 quite hot but become too cold if you remove the first two letters. What am I?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Which word does the below Plexor means ?

In a town, there are over 100 flats.
Flat-1 is named first flat.
Flat-2 is named second flat.
Flat-3 is named third flat.

A visitors 'Victor' decides to walk through all the flats, he finds all the flats except flat-62.
Victor later founds that the local of the town have given it another name.

What is the name of the Flat?

A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face-up cards. Remember, you are blindfolded.

How will you do it?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Can you solve the photo plexer logic ?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?