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Q: What is the LCM of 28 35 49 and 77?

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77－49＝28÷2＝〔14〕 21＋14＝35 35＋14＝49 49＋14＝63 63＋14＝77

The LCM is 539.

49 + 28 = 77

The LCM of 11, 28, and 77 is 308.

126

539

The LCM of these numbers is 385. LCM is Least Common Multiple.

308

7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, . . .

7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77 . . .

7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, . . .

539 49 = 72 77 = 7 x 11 lcm = 72 x 11 = 539

The LCM of 35, 77, and 192 is: 73,920

-7, -14, -21, -28, -35, -42, -49, -56, -63, -70, -77, -84, . . .

7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, . . .

14, 21, 28, 35, 42, 49, 56, 63, 70, 77 +7 . . .

308

1, 5, 7, 35 1, 7, 49 1, 7, 11, 77

7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84

7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77.

7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91 . . .

The greatest common factor of 35, 49, and 77 is 7. 77 = 7 x 11 35 = 7 x 5 49 = 7 x 7 ⇒ hcf is 7.

They are infinite, starting with these: 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84 . . .

7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98

7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84.