NUMBERS
VARIABLES
EQUATIONS
UNKNOWN
PRODUCTS
100

S X 4 =28

S=7

100

N X 3 =33

N=11

100

M X 4 = 16 

M=4

100

4 X T = 44

T=11

100

C X 3 =27

C=9

200

M X 8=32

M=4

200

S X 8 = 72

S=9

200

3 X S =33

S=11

200

M X 3=18

M=6

200

3 X M=24

M=8

300

 D X 3 =27

D=9

300

B X 3 =24

B=8

300

7 X C =56

C=8

300

4 X N = 44

N=11

300

S X 4=40

S=10

400

N X 6 =54

N=9

400

4 X N =28

N=7

400

B X 8 =64

B=8

400

7 X S = 42

S=6

400

P X 5 = 45

P=9

500

P X 7 =49

P=7

500

R X 12 =36

R=3

500

M X 9 = 63

M=7

500

6 X N =72

N=12

500

9 X S = 81

S=9