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210 and what number are common multiples of 420?
210 is not a multiple of 420. 420 is a multiple of 210.
WHAT numbers are multiples of both 2 and 3?
Multiples of 6 are.
What are the least common multiples of 20 30 and 15?
The multiples of 20 are 20, 40, 60, 80, 100, 120... The multiples of 30 are 30, 60, 90, 120, 150... The multiples of 15 are 15, 30, 45, 60, 75, 90, 105, 120, 135... The common multiples of 20, 30, and 15 are 60, 120, 180, 240...
What are the multiples of 24 and 40?
The multiples of 24 are 24, 48, 72 and so on. The multiples of 40 are 40, 80, 120 and so on. The common multiples of 24 and 40 are 120, 240, 360 and so on.
How you can find the common multiples and the least common multiple?
Example: 30 and 42 Factor them. 2 x 3 x 5 = 30 2 x 3 x 7 = 42 Select the highest amount of each factor. 2 x 3 x 5 x 7 = 210, the LCM Multiples of 210 will all be common multiples of 30 and 42 and can be found by multiplying 210 by successive counting numbers. 210 x 1 = 210 210 x 2 = 420 210 x 3 = 630 and so on.
