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Question
If 2A7 ÷ A = 33, then find the value of A.
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Solution
We observe that, 4 × 3 can never be a single-digit number 2, so 4 × 3 must be a two-digit number, whose ten’s digit is 2 and unit’s digit is the number less than or equal to 4. Therefore, the value of 4 can be 9, as the values of 4 from 1 to 8 do not fit.
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