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

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

Which is the smallest number that you can write using all the vowels exactly once?

Replace the question mark with the correct number below.

Why is Saturday stronger than Monday?

John was running from 40 thieves. John has got 3 gold boxes which weigh as 4kg, 2kg, and 1kg respectively. A witty man asked John to stay with him for seven days in exchange for 1kg gold per day. John needs to stay there for seven days and also do not want to give the witty man any advance. How can John pay for his seven days stay?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

When it's bad luck to meet a black cat?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?