What can you catch but never throw?

Find the next number in the series below

21 32 54 87 131 ?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

What is the word or phrase below?
R | E | A | D

Why do you find that most of the buildings are deprived of the 13th floor?

What has to be broken before you can use it?

81 x 9 = 801. What must you do to make the this equation true?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Doctor Alex and a bus driver John are both in love with the same woman named Olivia. The bus driver need to go for a long trip of 10 days, Before he left he gave Olivia 10 apples.

What question can you never answer yes to?