People make me, save me, change me, raise me. What am I?

Can you identify the hidden rebus in the image below?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

What goes up but never comes down?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

Can you identify the famous TV character from the rebus below?

Can you write down eight eights so that they add up to one thousand?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

Can anyone tell me a word in the English dictionary which has a silent 'z'?