Nihyakugoju breakdown

Nihao everyone! I'm trying to understand the breakdown of Nihyakugoju.

I know Ni=2 , Hyaku=100, Go=5 but what is Ju?

Arigato gozaimashita

こんにちは (Konnichiwa) Heru-,

Thank you for your question! 

The word じゅう (jū) means “ten," so the じゅう (jū) in にひゃくごじゅう (nihyakugojū) refers to the number “ten." 

Japanese uses a number stacking system where numbers are combined to create larger numbers. 

For example, ご (go) means "five” and じゅう (jū) means “ten." When we combine those together, we get ごじゅう (gojū) “fifty” - literally, “five tens.”  

Here's another example: さん (san) means “three"; when we combine さん (san) “three” and じゅう (jū) “ten” we get さんじゅう (sanjū) “thirty” - literally, “three tens."

In the number にひゃくごじゅう (nihyakugojū) we have: 

に (ni) = “two” 

ひゃく (hyaku) = “hundred”

ご (go) = “five”

じゅう (jū) = “ten”

When we combine that all together, we get “250” - literally, “two hundreds five tens.”

You can practice your Japanese counting in this lesson on numbers:

https://app.rocketlanguages.com/members/products/5/lesson/5226

I hope this helped! 

勉強を頑張ってください！ (Benkyō o ganbatte kudasai!) 

Muzukashii desu! Demo, ganbatte imasu! Domo :)