100, 200, 300, 400, 500
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They are 20, 40, 60, and 80.
Multiples of 20 are 20, 40, 60, 80, 100, 120, 140, 160, 180, 200…Multiples of 25 are 25, 50, 75, 100, 125, 150, 175, 200… Common multiples of 20 and 25 are 100, 200, 300, 400...
Multiples of what???For example, to get multiples of 20, just start with 20 and add 20 at a time: 20, 40, 60, ...
Multiples of 20 include 20, 40, 60, 80 and 100.
' 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 .