Patterns
Multiples of 10
3^2
9
8 x 5
40
16 x 3
48
15 x 15
225
Multiples of 11
Take the number and write it twice
10^2
20
8 x 9
72
28 x 3
84
374
Multiples of 5
Multiplying by odds end in 5 and evens end in 0
7^2
49
8 x 8
64
18 x 8
144
22 x 12
264
Multiples of 2
Increase by 2 & repeat for every 10
8^2
64
8 x 12
96
23 x 9
207
44 x 17
748
Multiples of 9
Every multiples' digits add up to 9
12^2
121
8 x 6
48
39 x 5
195
41 x 26
1066