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### 10 Cards in this Set

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 1 is not a prime number because it has only __ factor. 1 Sometimes the way we answer a division word problem with a remainder depends on the wording of the problem. In some cases we have to __________ the final answer up, and in other cases we have to drop off the remainder. round Is 91 prime? no...7x13=91 __ is the only even prime number. 2 Is 51 prime? no...5+1=6, so 51 is divisible by 3...3x17=51 A __________ number has exactly two factors, 1 and the number itself. prime Write 84 as a product of primes. 84/2...42/2...21/3...7 2x2x3x7 We say that 6 is a ____________ number because it can be composed by multiplying two numbers other than 1 and 6 together. composite Write 12 as a product of prime numbers. 2x2x3 Is 87 a prime number? no...8+7=15, so 87 is divisible by 3...3x29=87