1. © Hamilton Trust Keeping Up Term 1 Week 9 Day 2 Objectives: Find factors of two-digit numbers; Identify multiples of 2, 3, 4, 5, 6, 7 and 9.

2. What is a factor? 1, 5 and 25 are factors of 25 1, 2, 3, 4, 6 and 12 are factors of 12 1, 2, 4, 5, 10 and 20 are factors of 20 What is a multiple? 25 is a multiple of 5 30 is a multiple of 2, 3, 5, 6, 10 and 15 40 is a multiple of 2, 4, 5, 8, 10 and 20 © Hamilton Trust Keeping Up Term 1 Week 9 Day 2

3. What are the factors of 18? 18 1 3 2 6 9

4. © Hamilton Trust Keeping Up Term 1 Week 9 Day 2 Highlight a number on the 100 square. Highlight a factor or multiple of the first number. Continue to highlight numbers, that are factors or multiples of the previous number. Try to find the longest sequence of numbers that can be highlighted. Each number can only appear once in a sequence!

5. © Hamilton Trust Keeping Up Term 1 Week 9 Day 2 Find longest sequence of numbers that can be crossed out on your own 1-100 square… Start with 25. Highlight 5 as a factor of 25 Highlight 50 as a multiple of 25 Highlight 75 and 100 as multiples of 25 This is a sequence of five numbers Work in pairs

6. © Hamilton Trust Keeping Up Term 1 Week 9 Day 2 Choose 5 of these numbers and write a list of all of their factors. 1 35 49 57 42 60 36 100 Did the largest number have the most factors?

7. 1.Write the factors of 42. 2.Is 3 a factor of 42? 3.Write one number which is a multiple of both 5 and 6. 4.Write a number which is a factor of both 21 and 49. 5.Write the factors of 56. © Hamilton Trust Keeping Up Term 1 Week 9 Day 2