Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Can you find the 09 errors in the picture below?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

I have teeth but i don't bite. Who Am I ?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

What is the largest number you can write with just 3 digits?

What word begins and ends with an E, but has only one letter?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?