Enter Title

LCM

100

6 and 15

30

200

9 and 15

45

300

20 and 30

60

400

1 and 100

100

500

30 and 40

120

ADD

100

1/2 + 1/4 

3/4

200

1/3 + 1/2 

5/6

300

1/2 + 2/5 

9/10

400

1/3 + 1/4

7/12

500

1/5 + 1/4 

9/20

SUB

100

1/2 - 1/4 

1/4

200

3/4 - 3/5

3/20

300

2/5 - 1/3

1/15

400

1/2 - 1/5

3/10

500

3/4 - 2/3

1/12

X

100

2/3 x 1/4 

2/12

200

5/6 x 1/6

5/36

300

4/9 x 3/10

12/90

400

5/7 x 1/5

5/35

500

12/15 x 16/18

192/270

DIVIDE

100

3/4  /  1/2

6/4

200

5/6   /   2/3

15/12

300

3/7   /  1/4

12/7

400

7/9   /   1/3

21/9

500

What goes up but never comes down?

YOUR AGE