Any number ending in a 5, other than the number 5 itself, is composite.
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105 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
105 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
105 is not prime. 105 = 3 * 5 * 7
105 is a composite number because it has more than 2 factors
210 is composite: its factors are 1, 2, 3, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105 and 210. Hint: two is the only even prime number. All other even numbers are composite.