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Question
Find the quotient when 73 – 37 is divided by 9.
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Solution
Difference of 73 - 37 is to be divided by 9
Let ab = 73 and ba = 37
∴ a = 7 and b = 3
The quotient of 73 - 37 (i.e. ab - bc) when divided by 7 is a - b i.e. 7 - 3 = 4
`(because ("ab - ba")/9 = "a - b")`
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