Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

Can you solve the below rebus?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

What does this Rebus Picture means ?