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Mystery Operation II

Finally: a message was received from outer space!

At first glance it seems that it contains a sequence of 9 numbers coded as beeps and pauses. Large pauses group 3 numbers together, suggesting a relation might exist between them.


4 */* 2 = 5

12 */* 17 = 28

30 */* 10 = 36

Scientists immediately start transmitting our standard welcome message containing mathematical constants. For a while it looks as though no one listening until suddenly a second message is received. This message repeats only 2 numbers for a long period of time.

48 */* 73 

Maybe we're supposed to respond to it in order to make contact. Can you help scientists figure out what we should answer?

Edited by araver
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Posted · Report post

Daily example added:


4 */* 2 = 5

12 */* 17 = 28

30 */* 10 = 36

100 */*	93 = 186

42 */* 35 = 72

100 */* 21 = 116

12 */* 11 = 22

19 */* 29 = 48

41 */* 31 = 72

11 */* 18 = 28

------------------

48 */* 73 = ?

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Posted · Report post

...120

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Posted · Report post

...120

:thumbsup: Indeed it does. Can you explain why?

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Posted · Report post

Would you like me to? Got another lined up? In the vain of octopuppy, here's a fun one --> 238 */* 222 = 444

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Would you like me to? Got another lined up? In the vain of octopuppy, here's a fun one --> 238 */* 222 = 444

Your proof is accepted ;)

Sorry, no other mystery op lined up at the moment, been busy with preparing and now hosting a new mafia game. Plus octopuppy's CtC.

Leaving it unsolved so others can enjoy then!

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Posted · Report post

any more clues?

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Posted (edited) · Report post

Adding plainglazed's correct clue:


4 */* 2 = 5

12 */* 17 = 28

30 */* 10 = 36

100 */*	93 = 186

42 */* 35 = 72

100 */* 21 = 116

12 */* 11 = 22

19 */* 29 = 48

41 */* 31 = 72

11 */* 18 = 28

238 */* 222 = 444

------------------

48 */* 73 = ?

As he solved it, I did not post any more clues, but if anyone still wants to solve it, I will post more.

Edited by araver
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Posted · Report post

The solution was never explained and I am sadly stumped. I have a theory about varrying bases based on the given numbers but still no solution.

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The solution was never explained and I am sadly stumped. I have a theory about varrying bases based on the given numbers but still no solution.

You are right, the solution was not explained and the challenge is still open.

I'll continue to post examples - adding one now. Also, if you want to test your theory you can tell me a pair "(a,b)" and I will tell you "a */* b"


4 */* 2 = 5

12 */* 17 = 28

30 */* 10 = 36

100 */*	93 = 186

42 */* 35 = 72

100 */* 21 = 116

12 */* 11 = 22

19 */* 29 = 48

41 */* 31 = 72

11 */* 18 = 28

238 */* 222 = 444

11 */* 21 = 30

------------------

48 */* 73 = ?

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Posted · Report post

Adding another example to the challenge:


4 */* 2 = 5

12 */* 17 = 28

30 */* 10 = 36

100 */*	93 = 186

42 */* 35 = 72

100 */* 21 = 116

12 */* 11 = 22

19 */* 29 = 48

41 */* 31 = 72

11 */* 18 = 28

238 */* 222 = 444

11 */* 21 = 30

9 */* 13 = 20

------------------

48 */* 73 = ?

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Posted · Report post

How about 1 */* 0, 10 */* 0 and 1 */* 1?

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Posted (edited) · Report post

How about 1 */* 0, 10 */* 0 and 1 */* 1?

Hi k-man. I've added one of the three in the table below.


4 */* 2 = 5

12 */* 17 = 28

30 */* 10 = 36

100 */*	93 = 186

42 */* 35 = 72

100 */* 21 = 116

12 */* 11 = 22

19 */* 29 = 48

41 */* 31 = 72

11 */* 18 = 28

238 */* 222 = 444

11 */* 21 = 30

9 */* 13 = 20

1 */* 1 = 2

------------------

48 */* 73 = ?

EDIT: missed the example.

There's a catch: x */* 0 does not make sense i.e. is undefined.

I could define it just for the sake of making it a complete operation, but it would not be fair.

Edited by araver
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Posted · Report post

that x */* x = 2*x ?

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Posted · Report post

that x */* x = 2*x ?

Not always. E.g. 4 */* 4 = 6.

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Posted · Report post

120 as plainglazed has already revealed, so I will offer 112 */* 100 = 206 as proof of understanding.

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Posted · Report post

120 as plainglazed has already revealed, so I will offer 112 */* 100 = 206 as proof of understanding.

Correct. Proof accepted :thumbsup:

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