Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

Take away the whole and some still remain. What is it?

What does this rebus puzzle means ?

Find the missing number in the sequence below:

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.

I have eight fingers and two thumbs but I do not live. What Am I?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?