Find all the magic multiples of $6$ from $1$ to $100.$

Find the first five common multiples of the pair of numbers using sketch pens and dot sheets. Find the LCM.

$3 \mathrm{and} 18$

In the following number, replace * by the smallest digit to make it divisible by $9$.

$4*799$

Find the greatest number that can divide $93,111$ and $129$, with remainder $3$ in each case.

(Since,$93-3=90, 111-3=108$ and $129-3=126$)

$31$ is a factor of $20$.