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Divisibility Rules! Factor This! Can U Multiply The 4 step plan Exponents 100 100 100 100 100 7 12 17 22 2 200 200 3 300 200 8 300 4 400 300 400 500 19 15 24 400 20 500 16 23 300 400 500 11 18 14 10 200 300 400 500 6 13 9 5 200 25 500 21 26 FINAL JEOPARDY 100 The rule for being divisible by 2 The number ends in a 0, 2, 4, 6, or 8 200 3,065 is divisible by 5. How do I know this? It ends in a 5 or 0 300 Is 128 even or odd? Even 400 The rule for divisibility by 3 Add the digits and see if the number is divisible by 3 500 Is 1280 divisible by 10? Why or why not? Yes, because it ends in a 0 100 Is 45 a prime or composite number? Composite (95 = 45) 200 Find the prime factorization of 25 55 or 2 5 300 What is the prime factorization of 12? 223 400 Is 9 prime or composite? Composite 500 Name 5 prime numbers 2, 3, 5, 7, 11, 13, 17, 19, 23,29,31 100 What is another word that tells you to multiply times, of, factor, product 200 What is 3 x 11 DAILY DOUBLE 33 300 If 5 x 7 = 35, what does 35 5 = 7 400 Which answer is larger… 10 + 5 or 7x2 10 + 5 500 What is 3 x 2 x 4 24 100 What are the steps in the four step plan? Find, Solve, Explain, Answer 200 What is the find in this problem: Jupiter orbits the sun at 8 miles each second. How far does Jupiter travel in one day? How far does Jupiter travel in one day? 300 Solve this problem. The bus left at 10:00 and arrives at your house 20 minutes later. What time did the bus get to your house? 10:20 400 What does the step EXPLAIN want you to do? Tell why you did the math (added or subtracted…) 500 Name three words/phrases that mean subtract take away, less, difference, less than, minus 100 What does 5 7 mean? 7 x 7x 7 x 7 x 7 200 Write 4 x 4 x 4 using an exponent 3 4 300 Write “ten to the fifth power” as a product of the same factor 10 x 10 x 10 x 10 x 10 400 What does “squared” mean? to the second power 500 What does “cubed” mean? to the third power What two numbers are neither prime nor composite. 1 and 0