Timeline for What's in my pocket?
Current License: CC BY-SA 4.0
9 events
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| Apr 8, 2020 at 21:51 | history | edited | Beastly Gerbil | CC BY-SA 4.0 |
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| Apr 8, 2020 at 20:47 | comment | added | phoog | Yes, it is. I will vote accordingly. | |
| Apr 8, 2020 at 20:46 | comment | added | Beastly Gerbil | @phoog I see what you're saying now. I've editted my wording, I think know what I've said is correct. Thanks! | |
| Apr 8, 2020 at 20:46 | history | edited | Beastly Gerbil | CC BY-SA 4.0 |
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| Apr 8, 2020 at 20:40 | comment | added | phoog |
No: the rule as stated excludes multiples of 5 that aren't in the range. (I edited my comment just as you posted yours.) Values that satisfy rule 1 only are all values except ... -15, -10, -5, 0, 20, 25, 30, .... So rule 1 doesn't rule out 2, for example. If the sentence I quoted is intended to be a restatement of the rule, it is incorrect. If it is intended to be a conclusion deduced from multiple rules then it is part of your answer and it should be hidden.
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| Apr 8, 2020 at 20:39 | history | edited | Beastly Gerbil | CC BY-SA 4.0 |
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| Apr 8, 2020 at 20:37 | comment | added | Beastly Gerbil | @phoog this is true, notice the IF. For it to be between 1-19 then it MUST be a multiple of 5. And the only numbers satisfying this is 5, 10 and 15 of which it cannot be any. I agree with you second point however, and will edit. | |
| Apr 8, 2020 at 20:34 | comment | added | phoog | The reasoning here is faulty. "If M is between 1-19 then it is a multiple of 5" does not follow from "if M is a multiple of 5 then it must be between 1 and 19." The rule as given does not by itself exclude values in that range that aren't multiples of five; it excludes multiples of five that aren't in that range. Therefore, the assumption that the answer can't be more than 39 is unnecessary, because that fact can be deduced from the given conditions as illustrated in the other answer. | |
| Apr 8, 2020 at 20:12 | history | answered | Beastly Gerbil | CC BY-SA 4.0 |