Answer Brain Boom Which one changed secretly? Level 1

Answer Brain Boom How many “9”s are there among the 100 numbers from 1 to 100? Level 107

Answers to the game Brain Boom
IOS and Android
(Developer Shenzhen Yunbu Technology Co.,LTD)

How many “9”s are there among the 100 numbers from 1 to 100?
Level 107 Answer is 20
Answer Brain Boom How many "9"s are there among the 100 numbers from 1 to 100? Level 107