It is always ahead of me yet I can never see it. What is it?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

Can you move 2 matchsticks to form four equal sized squares.

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?