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Q: What are the common multiples of 20 up to 100?

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100 is the least common multiple of 20 and 25.

60 and 42 have no common multiples under 100.

The only common multiples of 6 & 7 up to 100 are 42 & 84.

20, 4, 60, 80, 100

Multiples of 9 up to 100 are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99. Multiples of 10 up to 100 are 10, 20, 30, 40, 50, 60, 70, 80. 90, 100. The only common multiple up to 100 of 9 and 10 is 90.

21,69

15,30,45,60,75,90

24,48,72,96

96 is the only common multiple of 24 and 32 up to 100.

Just 90.

Just 72.

' 1 ' is a factor of every whole number . . . . . 100 of them' 2 ' is a factor of every even number . . . . . 50 of them' 3 ' has 33 multiples up to 100 . . . . . 33 of them' 4 ' has 25 multiples up to 100 . . . . . 25 of them' 5 ' has 20 multiples up to 100 . . . . . 20 of them' 6 ' has 16 multiples up to 100 . . . . . 16 of them' 7 ' has 14 multiples up to 100 . . . . . 14 of them' 8 ' has 12 multiples up to 100 . . . . . 12 of them' 9 ' has 11 multiples up to 100 . . . . . 11 of themTotal . . . . . . . . . . . . . . . . . . . . . . . . . 281 one-digit factors in all whole numbers 1 to 100 .

28, 56, 84

Just 77.

36 and 72

4, 8, 12, 16 and 20

They are 24, 48, 72, and 96 .

Just 77.

21, 42, 63, 84

The only common multiple in that range is 100.

10, 20, 30, 40, 50, 60, 70, 80, 90, 100.

20, 40, 60, 80, 100, 120 and just keep adding 20 until you get to 1000

No - common multiples of 4 & 12 up to 100 are... 12, 24, 36, 46, 60, 72, 84 & 96

10, 20, 30, 40, 50, 60, 70, 80, 90, 100.

15, 30, 45, 60, 75, 90