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10 Cards in this Set

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  • Back
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