When you're telling time
In Australia
In outer space
Trigonometry
8
0
10
18
8 + 2 = 4 + 6
2 + 4 + 6 + 8
2 + 4 + 6 = 8
6 + 2 = 4 + 8
.
+
-
X
3
12
9
123,456,789
362,880
29
16
25
32