x9
x8
x7
x6
mystery
100

81

9x9

100

64

8x8

100

21

7x3

100

54

6x9

100

30 divided by 3

10

200

54

9x6

200

32

8x4

200

35

7x5

200

18

6x3

200

36 divided by 4

9

300

36

9x4

300

40

8x5

300

49

7x7

300

48

6x8

300

56 divided by 7

8

400

72

9x8

400

56

8x7

400

63

7x9

400

24

6x4

400

63 divided by 7

9

500

63

9x7

500

24

8x3

500

28

7x4

500

36

6x6

500

49 divided by 7

7