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

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

There are a hundred statements.

First person says: At least one of the statements is false.

Second person says: At least two of the statements is false.

Third person says: At least three of the statements are false.

Fourth person says: At least four of the statements are false.

..

..

..

Hundredth person says: At least a hundred of the statements are false.

Analysing it, how many statements do you think are false and how many are true?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

Count the number of squares in the picture below.

what's the probability of getting a king or a queen from a pack of 52 cards?

I don't get anymore wetter, no matter how much rain falls on me.

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?