Question
Using divisibility test, determine which of the following numbers are divisible by $9$?
$a.\ 672$
$b.\ 5652$
$a.\ 672$
$b.\ 5652$
✓
Answer
We know that, a number is divisible by $9$, if the sum of its digits is divisible by $9$.
$a.\ $We have, $672$
The sum of digits =$ 6 + 7 + 2 = 15$
which is not divisible by $9.$
$b.\ $We have, $5652$
The sum of digits $= 5 + 6 + 5 + 2 = 18$
which is divisible by $9$.
$a.\ $We have, $672$
The sum of digits =$ 6 + 7 + 2 = 15$
which is not divisible by $9.$
$b.\ $We have, $5652$
The sum of digits $= 5 + 6 + 5 + 2 = 18$
which is divisible by $9$.
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