Mathematics, 12.02.2021 17:10, deboahsouthall

Olivia’s passcode has four digits. The second digit from the left is three times the first (left-most) digit. The number formed by the last (right-most) two digits is three times the second digit from the left. The sum of the digits is 21. What is Olivia’s passcode?

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Olivia’s passcode has four digits. The second digit from the left is three times the first (left-mos...