Which part of London exists in France as well ?

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?

Can you find the 09 errors in the picture below?

You can see it everyday, But cannot touch it at will. What is it?

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

What does this rebus riddle means ?