(i) Give the first 10 multiples of 9.
(ii) Give the first 10 multiples of 6.
(iii) What are the first 3 common multiples of 9 and $ 6 ? $
(iv) What is the least common multiple of 9 and $ 6 ? $

(i) Multiples of 9 are $9\times1, 9\times2, 9\times3, 9\times4, .......$
 First 10 multiples of 9 are $9, 18, 27, 36, 45, 54, 63, 72, 81, 90$

(ii) Multiples of 6 are $6\times1, 6\times2, 6\times3, 6\times4, .......$

 First 10 multiples of 6 are $6, 12, 18, 24, 30, 36, 42, 48, 54, 60$

(iii) From the above, we can see that first 3 common multiples of 9 and 6 are $18, 36, 54$

(iv) Least common multiple of 9 and 6 is the smallest common multiple of 9 and 6.

Least common multiple of 9 and 6 is 18.