How could you make 21 using just the numbers 9 and 10?
-You can use these following symbols + - * /
-Use the least amount as possible
-Have fun
Oh! Or even
10+10=20
20+10=30
30-9=21
Yup. 9*10=90
90-10=80
80-10=70
70-10=60
(This is getting boring)
60-10=50
50-10=40
40-10=30
10+10+9/9=21
10+10+10/10=21
+298 
