What number do you get when you multiply all of the numbers on a telephone's number pad?

what does the below math rebus puzzle mean?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

You bought me for dinner but never eat me. What am I?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

What seven-letter word has hundreds of letters in it?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

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