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?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

When can we add 2 to 11 and get 1 as the correct answer?

They are three errirs in this question. Can you find them?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

There was a competition where the contestants had to hold something. At the end of the event, the winner was a person who had no hands or feet. What was it that the contestants had to hold?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

There are two insects on a tile. Insect X is sitting on one side of the tile (point A) and Insect Y is sitting opposite on the other side of the tile (point B). Now both of them decide to change their position and thus X starts crawling to point B and Y starts crawling to point A. When they meet and pass each other in between, X takes 20 seconds to reach B and Y takes just 5 seconds to reach A.

Can you calculate the total time each of the insects took to change their positions?

Can it be possible to build a house that has all its four walls facing towards the South?