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50 is composite. Composite numbers are divisible by numbers other than themselves and one. The number 50 is also divisible by 2, 5, 10, and 25, so 50 is composite.*ANY number that ends in zero can be divided evenly by 10 (and 5 and 2, for that matter). That means no number ending in 0 can be prime.50 is a composite number.
All even numbers between 50 and 80 are composite.
All the factors of 100 are 1, 2, 4, 5, 10, 20, 25, 50, and 100, 1,2, and 5 are prime numbers, so the composite number factors of 100 are 4, 10, 20, 25, 50, and 100.
Including 40 and 50 there are 8 composite numbers because 41, 43 and 47 are prime numbers.
All of the whole numbers between 50 and 75 are composite numbers, except 53, 59, 61, 67, 71, and 73.