im looking for a manga where the ch are ranked with numbers or letters like

DBZ: 5-100000000000 (it over 9000!!)
god of high school: level 13 hp 746 sp 250
toriko: monster level 1-100
witch hunter: d-s class fighters
yu yu hakusho: d-s ranked demons

there are probably many more that i have read but cant think of any more. thanks if you can help.

Well, there's a comparable system (using letters) in Gangsta. ^^

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"It's like love is a bonus in your life. Even without it, I'm just fine. I don't feel like pointlessly searching for it. You don't have to make yourself unhappy." (Ookami Shoujo to Kuro Ouji)

"Why does it rain?" - "To create drama." (Drops (Andou Yuki))

Try Hidan no Aria.

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（・◇・）/~~~ ♥

1/2 prince levels.

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Few favs
Comedy:
Kyou kara ore wa!!, Mx0, Angel Densetsu, Skip Beat, Ai Kora, The Devil King is Bored

Romance:
Hana to Akuma, No bra, Shinigami Trilogy, kindan no koi de ikou, Usagi Drop, Threads of Time, Girl Friends

Most under rated:
Kindan no koi de ikou, kyou kara ore wa!.
m0r l83r... maybe >_>

Ao no Futsumashi - the exorcists have a ranking system

thanks ill give them a try
...
anymore?

rebirth
at the beginning, at least (read the last pages of volume 1)

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sword art online
read the novel

Tower of God...I suppose? The rankers have levels and the floors themselves are levelled and there's a whole bunch of other stuff that's levelled. Not the characters particularly but...
Tantei Gakuen Q the classes are level ranked
Accord it's only just started but the characters with special abilities are ranked. The main character is SS.
I think that's all the ones I know of...

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I am the master of my fate;
I am the captin of my soul.
William Ernest Henely

I rate manga with 5 being the average score.

Gantz, they do points. Depending on the level of the alien you killed thats how much points you get.
Mx0 their card color determine their ability level i believe.

To aru majutsu no index
fairy tail
Baka to Test to Shoukanjyuu