Question 10
Alice writes all counting numbers from 1 to 99 on the blackboard. How many times does the digit “9” appear on the blackboard?
AMO 2027 Grades 2-3 SET 11 - Self-study Question 10
AMO · AMO 2027 Grades 2-3 SET 11 - Self-study
AMO · AMO 2027 Grades 2-3 SET 11 - Self-study