2. The Number By Reshma Rajagopalan

3. Why I Chose I chose the number 80 because it is a big number that has lots of interesting facts. Take Quiz Take Quiz

4. The Factor Game 80 would be a bad number to start the factor game with because it has a lot of factors. This means it’s abundant Take Quiz Take Quiz 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

5. Different Kinds of Numbers A composite number A composite number is a number that has factors other than 1 and itself. Eighty is a composite number An abundant number An abundant number is a number whose Proper Factors add up to more than itself. Eighty is an abundant number because its Proper Factors add up to 108 An even number An even number is a number that ends in 0, 2, 4, 6, or 8. Eighty is an even number 1 Take Quiz Take Quiz

6. Factors of 80 Take Quiz Take Quiz The factors of 80 are 1, 2, 4, 5, 8, 10, 16, 20, 40, and 80 80’s proper factors are 1, 2, 4, 5, 8, 10, 16, 20, and 40 80 has 5 factor pairs: 1 and 80, 2 and 40, 4 and 20, 5 and 16, 8 and 10

7. Different Ways to Make 80 There are different ways to make 80 by using rectangle models. The dimensions of each model would be one of 80’s factor pairs. 1 by 18 2 by 40 4 by 20 5 by 16 8 by 10

8. Prime Factorization of 80 The prime factorization of 80 is 2x2x2x2x5 or 2 x5 480 240 2220 2 2210 222 2 5 Take Quiz Take Quiz

9. Culture In Chinese culture, the number 8 and any number containing 8 is considered to be lucky This is how 80 is written in Mandarin:

10. The World of 80 In 80 AD the original Roman Pantheon was destroyed in a fire There’s a beach in Western Australia called The 80 Mile Beach In America, the second longest interstate is I-80 Take Quiz Take Quiz

12. Question 1 80 is an abundant number ( click on the correct answer) True False Back to Slide ShowNext Question

13. Question 2 I-80 the second longest ___ in America? (click on the correct answer) I-80 is the second longest highway I-80 is the second longest interstate Back to Slide ShowNext QuestionPrevious Question It is the second longest road

14. Question 3 True or False: Eighty is not a composite number. (click on the correct answer) True False Back to Slide ShowPrevious QuestionNext Question

15. Question 4 Is the beach in Western Australia called The 80 or 90 Mile Beach? (click on the correct answer) The 80 Mile Beach The 90 Mile Beach Back to Slide ShowPrevious QuestionNext Question

16. Question 5 What are the proper factors of 80? (click on the correct answer) 1,2,4,5,8,10,16,20 and 40 1,2,4,5,8,10,16,20,40 and 80 Back to Slide ShowPrevious QuestionNext Question 1,2,3,4,5,8,10,16,20 and 40

17. Question 6 How many factor pairs does 80 have? (click on the correct answer) 5 4 Back to Slide ShowPrevious Question

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