UCEED 2019

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UCEED2019Q13·nat·Hard61 attempts

In a new form of decimal system, the numbers 0 to 9 are represented by a new set of symbols. For example, the equation 1 + 4 = 5 is represented as equation (i). If in the solution to equation (iv) one digit appears twice, what number will replace the question mark?

Keyboards off — use the numpad, just like on exam day.