To find a digital root you work out the table and then add the digit in the multiples together until you get a single digit.
1x5=5; 2x5=10 1+0=1, 3x5=15 1+5=6...
1/5, 2/1, 3/6...
Then you record the patterns on your circle.
Can you help us to investigate 14x up to 21x and see if there are some more patterns the same? We will do this for homework.