ICSE BoardEnglish MediumSTD 8MATHSPlaying with Numbers3 Marks
Question
Find the quotient when $73 – 37$ is divided by $9.$
✓
Answer
Difference of $73 - 37$ is to be divided by $9$
Let $ab = 73$ and $ba = 37$
$\therefore a = 7$ and $b = 3$
The quotient of $73 - 37 ($i.e. $ab - bc)$ when divided by $7$ is $a - b$ i.e. $7 - 3 = 4$
$\left(\because \frac{a b-b a}{9}=a-b\right)$
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