The first 100 multiples of 5 can be calculated by multiplying 5 by each integer from 1 to 100. This results in a sequence starting from 5, 10, 15, 20, and so on, up to 500. The formula to find the nth multiple of 5 is 5n.
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The first 100 positive integer multiples of 5 are:
1 x 5 = 5
2 x 5 = 10
3 x 5 = 15
4 x 5 = 20
5 x 5 = 25
6 x 5 = 30
7 x 5 = 35
8 x 5 = 40
9 x 5 = 45
10 x 5 = 50
11 x 5 = 55
12 x 5 = 60
13 x 5 = 65
14 x 5 = 70
15 x 5 = 75
16 x 5 = 80
17 x 5 = 85
18 x 5 = 90
19 x 5 = 95
20 x 5 = 100
21 x 5 = 105
22 x 5 = 110
23 x 5 = 115
24 x 5 = 120
25 x 5 = 125
26 x 5 = 130
27 x 5 = 135
28 x 5 = 140
29 x 5 = 145
30 x 5 = 150
31 x 5 = 155
32 x 5 = 160
33 x 5 = 165
34 x 5 = 170
35 x 5 = 175
36 x 5 = 180
37 x 5 = 185
38 x 5 = 190
39 x 5 = 195
40 x 5 = 200
41 x 5 = 205
42 x 5 = 210
43 x 5 = 215
44 x 5 = 220
45 x 5 = 225
46 x 5 = 230
47 x 5 = 235
48 x 5 = 240
49 x 5 = 245
50 x 5 = 250
51 x 5 = 255
52 x 5 = 260
53 x 5 = 265
54 x 5 = 270
55 x 5 = 275
56 x 5 = 280
57 x 5 = 285
58 x 5 = 290
59 x 5 = 295
60 x 5 = 300
61 x 5 = 305
62 x 5 = 310
63 x 5 = 315
64 x 5 = 320
65 x 5 = 325
66 x 5 = 330
67 x 5 = 335
68 x 5 = 340
69 x 5 = 345
70 x 5 = 350
71 x 5 = 355
72 x 5 = 360
73 x 5 = 365
74 x 5 = 370
75 x 5 = 375
76 x 5 = 380
77 x 5 = 385
78 x 5 = 390
79 x 5 = 395
80 x 5 = 400
81 x 5 = 405
82 x 5 = 410
83 x 5 = 415
84 x 5 = 420
85 x 5 = 425
86 x 5 = 430
87 x 5 = 435
88 x 5 = 440
89 x 5 = 445
90 x 5 = 450
91 x 5 = 455
92 x 5 = 460
93 x 5 = 465
94 x 5 = 470
95 x 5 = 475
96 x 5 = 480
97 x 5 = 485
98 x 5 = 490
99 x 5 = 495
100 x 5 = 500
-15
They are 20, 40, 60, 80, 100.
The multiples of 5 that are also multiples of 6 are multiples of their LCM. The LCM of 5 and 6 is 30, so the question becomes which multiples of 30 are less than 100? The solution is the numbers: 30, 60, 90
20
There are five multiples of six that fall between 70 and 100: 72, 78, 84, 90, 96.