2 by 1
12x7
84
115x2
230
12x13
156
Factors of 15
1, 3, 5, 15
First four multiples of 7
7, 14, 21, 28
15x3
45
135x3
405
15x14
210
Factors of 12
1, 2, 3, 4, 6, 12
First four multiples of 12
12, 24, 36, 48
120
453x5
2,265
27x42
1,134
Factors of 24
1, 2, 3, 4, 6, 8, 12, 24
First four multiples of 15
15, 30, 45, 60
57x6
342
687x3
2,061
19x68
1,292
Factors of 30
1, 2, 3, 5, 6, 10, 15, 30
First four multiples of 18
18, 36, 54, 72
98x4
392
795x4
3,180
36x74
2,664
Factors of 48
1, 2, 3, 4, 6, 8, 12, 16, 24, 48
First four multiples of 26
26, 52, 78, 104