Week 2 check point - Dana Dutch Math 115-Basic Math Week...

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Math 115-Basic Math Week 2-Check Point Section 2.1 List the factors for the following numbers. 12. 37- 1 & 37 are the factors 37 is a prime factor because its only factor are 1 and itself (37) 16. List all the prime numbers between 55 and 75? Well the prime numbers are 59,61,67,71,73 22 . Dr. Mento has a class of 80 students. For a group project, she wants to divide the students into groups of 6, 8, or 10. Is this possible? Explain your answer. Get the factors of 80: 80 = 10*8 = 5*2*8 = 5*2*2*2*2 He can't do groups of 6, since there is no factor of 3. He can do groups of 10, since 10 = 5*2. He can do 8, since 8 = 2*2*2, and we have those factors. Section 2.2 16. Find the prime factorization of 400? the prime factors are 2,2,2,2,5,5. How I got that answer was 400 = 4 x 100 = 4 x 10 x 10 = (2 x 2) x (2 x 5) x (2 x 5) = 2 4 x 5 2 = 400 22. Find two factors of 15 with a difference of 2. The two factors are 3 and 5. How I got the answer was (3)(5)=15 and 5-3=2 38. Find the greatest common factor between 15,45 and 90. Ok the greatest common factor between the numbers is 15. To get the answer I multiply by 15. 1*15=15 15*2=30 15*3=45 and so on. . To get to 90 I multiply 15*6=90. So the greatest number is 15. Section 2.3
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Week 2 check point - Dana Dutch Math 115-Basic Math Week...

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