Can you find out the remainder when 3^300 is divided by 5?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

If 21x = 79x, what is the value of x?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

There was a kingdom in which the king had no heir to take over his thrown. Even the queen was dead and he himself was on the verge of dying. He thought about it and then summoned all of the teenagers. He gave one seed each to all of them and asked them to grow the plant. He announced that the one with the most beautiful plant will become the king/queen of the empire after the death of the king.

After a month, all of them were called. The king looked at all of the plants but announced the girl with an empty pot as the queen of the empire. Why?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?