1. Activity 1: 5 columns
Write the multiples of 3 into the table below. What patterns do you notice? Colour the odd numbers yellow and the even numbers blue. What patterns do you notice now?
Write about what you notice: 3 6 9

2. Multiple of 3 Digital Sum 3 6 9 12 15 18 21 24 27 30 33
Activity 2: Digital Sums
Calculate the digital sums of the multiples of three by adding the digits in each number, e.g. 18 -> = 9
Is there a pattern in the digital sums?
Plot the series on the circle below. What do you notice?
Multiple of 3
Digital Sum 3 6 9 12 15 18 21 24 27 30 33 1 2 3 4 5 6 7 8 9

3. Activity 3: Ones place
What number is in the ones place in the multiples of 3? Is there a pattern in the ones place? Will it repeat?
Plot the series on the circle below. What do you notice?
Multiple of 3
Ones digit 3 6 9 12 15 18 8 21 24 27 30 33 9 1 8 2 7 3 6 4 5