The number 8 would be its simplest form.<span />
Ok so when the divisor get larger, the quotient gets smaller.
For example, 15 ÷ 3 = 5. If we make the divisor larger, you can see the quotient get smaller. 15 ÷ 5 = 3.
The same thing goes for the other way around. If the divisor gets smaller, the quotient gets larger. Hope I helped!
In order of problems/numbers - 4, 3, 5, 6, 1, 2
You didnt provide the selections, but some answers would most likely be rotations, translations, and reflections.