What is this Operation?
12/2/05
Describe what the operation * is doing exactly. Because A*B=B*A, only half of the table is shown.
* |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
0 |
0 |
0 |
8 |
8 |
8 |
8 |
8 |
0 |
8 |
8 |
1 |
1 |
u |
3 |
4 |
9 |
8 |
7 |
8 |
9 |
|
2 |
2 |
u |
8 |
8 |
8 |
u |
8 |
8 |
||
3 |
3 |
9 |
9 |
8 |
3 |
8 |
9 |
|||
4 |
4 |
9 |
8 |
u |
8 |
9 |
||||
5 |
5 |
6 |
9 |
8 |
9 |
|||||
6 |
6 |
8 |
8 |
8 |
||||||
7 |
7 |
8 |
9 |
|||||||
8 |
8 |
8 |
||||||||
9 |
9 |
Hint: think of a digital clock
Answer: As of 6/20/09 no one has the answer, so I'll spill the beans. Take a standard digital clock, and cross your eyes until number A overlaps number B. The number A*B is what the overlap of A and B produces.
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