Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- 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
|
