The positive integer multiples of 7 with products up to 420 are:
1 x 7 = 7
2 x 7 = 14
3 x 7 = 21
4 x 7 = 28
5 x 7 = 35
6 x 7 = 42
7 x 7 = 49
8 x 7 = 56
9 x 7 = 63
10 x 7 = 70
11 x 7 = 77
12 x 7 = 84
13 x 7 = 91
14 x 7 = 98
15 x 7 = 105
16 x 7 = 112
17 x 7 = 119
18 x 7 = 126
19 x 7 = 133
20 x 7 = 140
21 x 7 = 147
22 x 7 = 154
23 x 7 = 161
24 x 7 = 168
25 x 7 = 175
26 x 7 = 182
27 x 7 = 189
28 x 7 = 196
29 x 7 = 203
30 x 7 = 210
31 x 7 = 217
32 x 7 = 224
33 x 7 = 231
34 x 7 = 238
35 x 7 = 245
36 x 7 = 252
37 x 7 = 259
38 x 7 = 266
39 x 7 = 273
40 x 7 = 280
41 x 7 = 287
42 x 7 = 294
43 x 7 = 301
44 x 7 = 308
45 x 7 = 315
46 x 7 = 322
47 x 7 = 329
48 x 7 = 336
49 x 7 = 343
50 x 7 = 350
51 x 7 = 357
52 x 7 = 364
53 x 7 = 371
54 x 7 = 378
55 x 7 = 385
56 x 7 = 392
57 x 7 = 399
58 x 7 = 406
59 x 7 = 413
60 x 7 = 420
7, 14, 21 and just keep adding 7 until you get to 294.
406, 413, 420, 427, 434, 441, 448, 455, 462, 469, 476, 483, . . . .
4,8,12,16,20
All multiples of 7, which is an infinite number.
Oh, dude, you want common multiples of 3 and 7 up to 100? Well, let me break it down for you. The common multiples of 3 and 7 are numbers that both 3 and 7 can divide evenly into. So, the common multiples of 3 and 7 up to 100 are 21, 42, 63, and 84. Like, that's it.
the first three common multiples of 7, 20, and 35 are 140, 280, and 420
140, 280, 420 and so on.
Any multiple of 420
140, 280, 420 and so on.
The first common multiple of 3 4 5 and 7 is 420.
84, 168, 252, 336, 420, 504, 588
140, 280, 420 and so on.
Any multiple of 420.
They are: 140, 280 and 420
140, 280, 420
140, 280, 420
The first five common multiples of seven and twenty are: 140, 280, 420, 560, 700.