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 know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Why Wine Glass Stem is so long?

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

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Whats the next number in the below number sequence pattern.