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10 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Under 20 |
2. 7. 17 3. 11. 19 5. 13 |
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20-60 |
23. 37. 47 29. 41. 53 31. 43. 59 |
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All under 60 |
2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 |
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Only even prime #? |
2 |
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Is 1 a prime #? |
No |
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How do we know if a # less than 100 is prime? |
If you can divide it by a prime number less than 10, it's a prime # |
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What is prime factorization? |
Breaking down all the factor of a multiple into prime factors |
96= 2*48 = 2*6*8= 2*2*3 * 2*2*2 |
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Find the # of factors of a positive integer? |
Prime factorization of #, written using powers. Create list of exponents used (1 for none) Add 1 to every exponent # Find product of new list |
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Find # of odd factors? |
Same as before, prime factorization with list of exponents adding one multiply all, but only using odd factors |
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Find # of even factors? |
Find # of total factors Find # of odd factors Subtract |
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