Chinese Numbers 10 – 100 : Read for practice!

23 二十三 èrshísān

65 六十五 liùshíwǔ

31 三十一 sānshíyī

77 七十七 qīshíqī

More information on the Chinese numbers you can find in The Chinese Numerals for Businessmen by Polina Shinkina http://www.lulu.com/content/e-book/the-chinese-numerals-for-businessmen/19124210 or in each Chinese textbook by Polina Shinkina on http://www.lulu.com/spotlight/polina985