what does this picture(rebus) riddle means ?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

Identify the hidden meaning behind this picture?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

Solve the puzzle by telling what does below picture means.

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

You can see three almost identical images below. Can you spot the odd one out from them?