Multiples of 0-1
Multiples of 2-3
Multiples of 4-5
Multiples of 6-7
Multiples of 8-9
100

2 x 1

2

100

2 x 5

10

100

4 x 2

8

100

6 x 3

18

100

9 x 2

18

200

0 x 72

0
200

3 x 4

12

200

5 x 2

10

200

7 x 2

14

200

8 x 2

16

300

67 x 1

67

300

5 x 3

15

300

4 x 7

36

300

6 x 6

36

300

9 x 5

40

400

14 X 0

0

400

2 x 7

14

400

5 x 10

50

400

7 x 5

35

400
9 x 9
What is 81
500

1 x 12

12

500

3 x 7

21

500

4 x 8

32

500

6 x 7

42

500

8 x 8

64