Solve number sequences: 18, 42, 82, 232, 58, 60, 282 ---> 792; etc

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Salamece

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please find the logic in the following number sequences

the number behind the ---> is the supposed answer according to this test i did.
we had 23 sec per sequence, these were the ones i had wrong but even after spending more than 23 seconds on them i did not manage to find the logic.
I am wondering if they might be actually random (no logic in them at all), if that is true than this test probably doesnt test IQ at all, instead tests RNG luck.


18, 42, 82, 232, 58, 60, 282 ---> 792 ?
4, 12, 22, 31, 40, 50, 58 ---> 69 ?
21, 45, 85, 235, 61, 63, 285 ---> 795 ?
17, 41, 81, 231, 57, 59, 281 --> 791 ?
15, 17, 4, 36, 57, ---> 97 ?
8, 16, 26, 35, 44, 54, 62, ----> 73 ?
12, 20, 30, 39, 48, 58, 66 --->> 77 ?
 
Salamece said:
please find the logic in the following number sequences

the number behind the ---> is the supposed answer according to this test i did.
we had 23 sec per sequence, these were the ones i had wrong but even after spending more than 23 seconds on them i did not manage to find the logic.
I am wondering if they might be actually random (no logic in them at all), if that is true than this test probably doesnt test IQ at all, instead tests RNG luck.


18, 42, 82, 232, 58, 60, 282 ---> 792 ?
4, 12, 22, 31, 40, 50, 58 ---> 69 ?
21, 45, 85, 235, 61, 63, 285 ---> 795 ?
17, 41, 81, 231, 57, 59, 281 --> 791 ?
15, 17, 4, 36, 57, ---> 97 ?
8, 16, 26, 35, 44, 54, 62, ----> 73 ?
12, 20, 30, 39, 48, 58, 66 --->> 77 ?
Click to expand...

I'd say they are intended to waste your time. Individually, they look random to me, but there's something more than that going on.

The usual first thing to look at is the pattern of successive differences, and when you do that, you find that #1,3,4 have the same pattern, and #2,6,7 have the same pattern -- which means that each term of #3 is 3 more than the corresponding term of #1, #4 is 1 less than #1, and similar relationships among the others. But this tells me that there is no sense in looking for more interesting patterns, because those would not preserve differences.

I think it's a gullibility test. Where did it come from?
 
Salamece said:
… tests RNG luck.
Click to expand...
Please translate.

I looked up RNG using the Urban Dictionary, but I can't parse your usage with any of their definitions. (RNG seems like on-line gaming jargon.)

If you meant 'tests random number generator luck', then I'm not sure what that means, either.
 
Salamece said:
please find the logic in the following number sequences

the number behind the ---> is the supposed answer according to this test i did.
we had 23 sec per sequence, these were the ones i had wrong but even after spending more than 23 seconds on them i did not manage to find the logic.
I am wondering if they might be actually random (no logic in them at all), if that is true than this test probably doesnt test IQ at all, instead tests RNG luck.


18, 42, 82, 232, 58, 60, 282 ---> 792 ?
4, 12, 22, 31, 40, 50, 58 ---> 69 ?
21, 45, 85, 235, 61, 63, 285 ---> 795 ?
17, 41, 81, 231, 57, 59, 281 --> 791 ?
15, 17, 4, 36, 57, ---> 97 ?
8, 16, 26, 35, 44, 54, 62, ----> 73 ?
12, 20, 30, 39, 48, 58, 66 --->> 77 ?
Click to expand...

[h=2]The On-Line Encyclopedia of Integer Sequences Does not recognize any of those integer sequences.[/h]
 
Salamece said:
4, 12, 22, 31, 40, 50, 58 ---> 69 ?


8, 16, 26, 35, 44, 54, 62, ----> 73 ?

12, 20, 30, 39, 48, 58, 66 --->> 77 ?
Click to expand...

Look at the second, sixth, and seventh sequences above.

Look at alternative differences:

12 - 4 = 8, 31 - 22 = 9, 50 - 40 = 10, 69 - 58 = 11

16 - 8 = 8, 35 - 26 = 9, 54 - 44 = 10, 73 - 62 = 11

20 - 12 = 8, 39 - 30 = 9, 58 - 48 = 10, 77 - 66 = 11
 
mmm4444bot said:
That reference does not contain all Integer sequences (interesting or not).
Click to expand...
Well of course never say all, you should know that. However having edited tests for years, I can tell you that I never found a significant example that was not known on that site. That is, if the sequence in worth testing it is known there.
 
pka said:
… I can tell you that I never found a significant example that was not known on that site …
Click to expand...
How significant does an example need to be?


… if the sequence [is] worth testing it is known there.
Click to expand...
When you say 'testing' in this thread, is your meaning basically 'discussing'?
 
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