400 800 1200 multiples of 4
There are 143 such numbers, too many to list.
These are the first 90 multiples of 7:714212835424956637077849198105112119126133140147154161168175182189196203210217224231238245152159266273280287294301308315322329336343350357364371378385392399406413420427434441448455462469476483490497504511518525532539546553560567574581588595602609616623630
21, 42, 63, 84
Multiples of 7 include 7, 14, 21, 28 and so on. For them to be common, they need to be compared to another set of multiples.
400 / 7 = 57, so there are 57 multiples of 7 under 400.
There are 57 such numbers.
multiples of 400: 400, 800, 1200, 1600, 2000, 2400, ...
The multiples of 7 between 200 and 400 are: 203, 210, 217, 224, 231, 238, 245, 252, 259, 266, 273, 280, 287, 294, 301, 308, 315, 322, 329, 336, 343, 350, 357, 364, 371, 378, 385, 392, 399. The sum of all the multiples of 7 between 200 and 400 is 8,729.
4,8,12,16,20
288 236 242 250 258 266
there are 9 multiples. they are 300,312,324,336,348,360,372,384,396.
57 of them.The first one is (1 x 7) = 7, and the 57th one is (57 x 7) = 399 .
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.
They are numbers of the form 4*k where k is an integer from 1 to 100.
400, 800, 1200 and so on to infinity.
Just 77.