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AMO 2027 Grades 6-7 SET 9 - Self-study Question 14

AMO · AMO 2027 Grades 6-7 SET 9 - Self-study

Question 14

George is trying to unlock the forgotten passcode for his luggage. The passcode consists of 3 digits, each of which is from 0 to 9.
He tried 923, only one digit is correct and correctly placed.
He tried 958, only one digit is correct but wrongly placed.
He tried 379, only two digits are both correct but wrongly placed.
He tried 142, none of the numbers is correct.
He tried 127, only one digit is correct but wrongly placed.
What is George’s passcode?