The whole numbers having 9 as a factor are all multiples of 9. The first twelve of these numbers are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99 and 108.
NOTE : the sum of the digits any number which is a multiple of 9 add up to 9 or a multiple of 9. For example 3501 is divisible by 9 as 3+5+0+1 = 9
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All composite numbers can.
nine 2 is the 45
1/4 of all numbers are factored by 4 and 1/6 of all numbers are factored by 6
Nine of them.
28 = 2x2x7