Question

Write three numbers greater than 20 that have 9 as a factor

Answer 1

there is 27 (9 goes 3 times into it)
there is 36 (9 goes 4 times into it)
there is 45 (goes 5 times into it)


others are 54, 63, 72, 81, 90, and 108. (many more)

Answer 2

an easy way is to multiply 9 by factors of 10
10
100
1000
9 times 10=90
9 times 100=900
9 times 1000=9000
and so on

or you could find multipules of 9 that are over 27
multipulse are
9,18,27,36,45,54,63,72,81,90,99,108,117,126,135,144,153,162,171,180,189,198,207,216, etc
so basically you could use any number in that list from 27 and after