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All multiples of the lowest common multiple of two numbers are common multiples of both the numbers; lcm(7, 20) = 140 → their (infinitely many) common multiples are the multiples of 140, namely:

140, 280, 420, 560, 700, 840, 980, 1120, 1260, 1400, 1540, 1680, 1820, 1960, 2100, 2240, 2380, 2520, 2660, 2800, 2940, 3080, 3220, 3360, 3500, 3640, 3780, 3920, 4060, 4200, 4340, 4480, 4620, 4760, 4900, 5040, 5180, 5320, 5460, 5600, 5740, 5880, 6020, 6160, 6300, 6440, 6580, 6720, 6860, 7000, 7140, 7280, 7420, 7560, 7700, 7840, 7980, 8120, 8260, 8400, 8540, 8680, 8820, 8960, 9100, 9240, 9380, 9520, 9660, 9800, 9940, 10080, 10220, 10360, 10500, 10640, 10780, 10920, 11060, 11200, 11340, 11480, 11620, 11760, 11900, 12040, 12180, 12320, 12460, 12600, 12740, 12880, 13020, 13160, 13300, 13440, 13580, 13720, 13860, 14000, ...

Pick any 5 of them.

Q: What are the five common multiples of 7 and 20?

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140, 280, 420, 560, 700.

They are any five multiples of 28.

The lowest common multiple of 7 and 12 is 84. Therefore, the multiples of 7 and 12 are multiples of 84. The first five are: 84 168 252 336 420

20 just do 4 times whatever and 7 times whatever until you get a like answer :)

The common multiples of 3 and 7 are 21, 42, 63 and so on.

Related questions

140, 280, 420, 560, 700

140, 280, 420, 560, 700

140, 280, 420, 560, 700

140, 280, 420, 560, 700.

140, 280, 420, 560, 700

140, 280, 420, 560, 700.

The LCM of 7 and 20 is 140

140, 280, 420, 560, 700

The first five common multiples of seven and twenty are: 140, 280, 420, 560, 700.

140

the first three common multiples of 7, 20, and 35 are 140, 280, and 420

140, 280, 420, 560, 700