The Three Common Uses of 多(duō) in Chinese

多, is pronounced as [duō], which means many, more. Now we will talk about the three most commonly used meanings in the beginning level.
1.A: 你今年多大了？ How old are you?
(Nǐ jīnnián duōdàle?)

B: 我今年20岁。I`m 20 years old this year.
(Wǒ jīnnián 20 suì.)
2.人很多。
(Rén hěnduō.)

他的头发不多。
(Tā de tóufa bù duō.

3多(个)人 （Shí duō (gè) rén）

一百多本书 （yībǎi duō běn shū）