What four weights can be used to balance from 1 to 30 pounds?

What does this rebus means ?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

I am sure no one can have two things for dinner. what are they?

A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

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

How can you make a TV, a bed, a dog, and a car liquid?

Can you replace the question mark with the correct number?