What does this rebus puzzle means ?

Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Can you make four (4) nines (9) equal 100?

I am white when I am dirty, and black when I am clean. What am I?

Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?