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15 Cards in this Set
- Front
- Back
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Number theory |
A branch of mathematics that is devoted to the study of the set of counting numbers |
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Prime |
A counting number with exactly 2 different factors itself and 1 |
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Prime factorization |
Use ladder method |
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Fundamental theory of arithmetic |
Each composite number of primes in exactly 1 way (except for the order of factors) there is one set of prime numbers for a certain numerator. |
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Definition of divides for any whole number a and b where b doesn't =0 b divides a off there is a unique whole number such as quickly that is a =b×q |
True |
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A number is divisible by 2 if |
It's ones digit is 0 2 4 6 8 |
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A number is divided by 5 if |
It's ones digit is 0 or 5 |
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A number is divas able by 10 if |
The ones digit is 0 |
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A number is divas able by 4 if |
It's last 2 digits rep a number divisible by 4. |
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A number is disable by 8 if |
The last 3 digits rep a number divisible by 8 |
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A number is divisible by 6 iff |
The sum of its digits are divided by 3 and 2 |
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GCF |
The greatest common factor that goes into both numbers |
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LCM |
The lowest nonzero whole number that both numbers have in common as a multiple |
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GCF AND LCM Set intersection |
Pull out factors
Prime each factor if there is a factor other then 1 |
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Density property of fractions |
Between any 2 fractions on a number line, there is always a fraction between them. |
