How many numbers less than 55?
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In other words, 55 can be divided by 1, by itself and at least by 5 and 11. So, 55 is a 'composite number'. List of composite numbers before 55: 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55.
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