Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

The more you take me, the more you leave me behind.
Who Am I?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

Solve the following series:
AZ, GT, MN, __, YB

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

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

What always comes into a house through the keyhole?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

Identify the hidden meaning behind this picture?

Complete the table series riddle by finding the number that can replace "??".