Post A13pOdXUNXIsGXfi8O by NekoSock@niu.moe
(DIR) More posts by NekoSock@niu.moe
(DIR) Post #A13j6VBs53vPR3WuIq by NekoSock@niu.moe
2020-11-10T15:24:22Z
1 likes, 0 repeats
fedi help
(DIR) Post #A13jSuENf4FfT4O1YW by phil@elekk.xyz
2020-11-10T15:28:22Z
1 likes, 1 repeats
@NekoSock cat + table - turtle = 170table + turtle - cat = 130add the 2 lines together:2 tables = 300 cm1 table = 150 cmI have no idea what I am saying.
(DIR) Post #A13jcAyelgKS0oS5NQ by NekoSock@niu.moe
2020-11-10T15:30:06Z
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@phil > I have no idea what I am saying.Your genius is so misunderstood even you don't understand yourself 🙏
(DIR) Post #A13lEfNYHg03G80w7c by fristi@kartoffel.cafe
2020-11-10T15:48:13.549675Z
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@phil @NekoSock good job
(DIR) Post #A13mIxqjeVQxepHHDk by phil@elekk.xyz
2020-11-10T15:58:49Z
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@fristi @NekoSock I have to say it seams pretty tough for elementary school. My 9 yo would never make it.
(DIR) Post #A13mIy4Yp6UcLhkJlo by fristi@kartoffel.cafe
2020-11-10T16:00:15.987324Z
1 likes, 0 repeats
@phil @NekoSock you'd be surprised though, kids have a different way of looking at things.
(DIR) Post #A13mNPCBvEzrd0QnLM by NekoSock@niu.moe
2020-11-10T16:01:01Z
1 likes, 0 repeats
@phil @fristi some people in my class managed to solve it using an equation with 3 unknown variables.The simpler solution you found is more about really strong logic skills, I wonder if they emphasise more on that in China 🤔
(DIR) Post #A13mVKTBNRKdHt9nUm by fristi@kartoffel.cafe
2020-11-10T16:02:30.498650Z
1 likes, 0 repeats
@NekoSock @phil I think it's more a case of "don't think to hard about it" which is exactly what we would do, but a kid wouldn't.
(DIR) Post #A13opI9dtVNHo6fEHI by alex@lor.sh
2020-11-10T16:28:19Z
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@NekoSock 150cm
(DIR) Post #A13opfBuFFqrFmtrV2 by NekoSock@niu.moe
2020-11-10T16:28:35Z
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@alex 💯
(DIR) Post #A13pCZYLNDXSQaJpcO by enigmatico@fedi.absturztau.be
2020-11-10T16:32:43.736955Z
1 likes, 0 repeats
@NekoSock @phil @fristi @NekoSock All I know is that the height of the table (T), with the cat (C) and minus the turtle (Tu) is 170. So the height of the table must be 170 minus the cat, plus the turtle. Right?T = 170 - C + TuWe also know that the table with the turtle minus the cat is 130. So the height of the table is alsoT = 130 - Tu + CTherefore130 - Tu + C = 170 - C + Tu- Tu + C + C - Tu = 170 - 1302C - 2Tu = 40Now we know that the height of 2 cats minus the height of 2 turtles is 40 in total. But how tall is each animal?Tu = (40 / 2) - CTu = 20 - CSo... the height of the turtle is 20 minus the height of the cat. How tall is the cat?2C - 2 * (20 - C) = 402C - 40 - 2C = 40- 2 (20 -C) = 2C - 402C - 40 + 2C = 404C = 40 + 404C = 80C = 80 / 4C = 20The height of the cat is 20! Now, to get the height of the turtle:Tu = 20 - 20 = 0The height of the turtle is... 0?????If that's correct then the height of the table isT = 170 - 20 + 0 = 150
(DIR) Post #A13pOdXUNXIsGXfi8O by NekoSock@niu.moe
2020-11-10T16:34:40Z
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@enigmatico @phil @fristi Correct! 🎉 💯 You actually can't know the height of the animals, because the equation would still hold true, even if they were, say, 10cm taller.
(DIR) Post #A13prxmaC1bJRoiR3w by enigmatico@fedi.absturztau.be
2020-11-10T16:40:02.202539Z
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@NekoSock @phil @fristi Yeah, well... I got really confused because I did it one time but got to the conclusion that the turtle was 0 before knowing what the cat was. So I thought that was not possible and decided to start over, this time solving the height of the cat first. It was very confusing, but the logic is easy.
(DIR) Post #A13py60YWYZEhCAxbE by NekoSock@niu.moe
2020-11-10T16:41:05Z
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@enigmatico @phil @fristi That's a great attitude! You never give up! :ablobcatattention:
(DIR) Post #A13q0F6VfzM9UAz5qS by GNUxeava@fedi.absturztau.be
2020-11-10T16:41:42.473632Z
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@NekoSock let cat, table and turtle be a, b, and c respectively.According to problem, a + b - c = 170 and b + c - a = 130.Clearly, we need another equation in a, b and c to determine the value of the three values.
(DIR) Post #A13qVgMWNfE30ESttI by NekoSock@niu.moe
2020-11-10T16:47:11Z
1 likes, 0 repeats
@GNUxeava How about 130 - c + a = 170 - a + c ?
(DIR) Post #A13rZQA2et8BrryUKW by NekoSock@niu.moe
2020-11-10T16:59:10Z
1 likes, 0 repeats
@GNUxeava Actually, idk if that's really true, but someone else used it in the replies to this post and got the answer right. This problem is definitely solvable
(DIR) Post #A13ssymqFEM0iL0rku by GNUxeava@fedi.absturztau.be
2020-11-10T17:14:00.655136Z
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@NekoSock adding both sides, we geta + b - c + b + c - a =170 + 130=> 2b = 300=> b = 150Putting b = 150 in equation 1 and 2, we geta + 150 - c = 170 => a - c = 20150 + c - a = 130 => -a + c = -20Adding both equations, LHS and RHS become zero. The fuck? What went wrong here?
(DIR) Post #A13t0Ke5NAIUXEQJPs by GNUxeava@fedi.absturztau.be
2020-11-10T17:15:20.360210Z
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@NekoSock wait, b is table and i already found b so everything should be fine, i guess
(DIR) Post #A13t14C01vABnRdX1c by NekoSock@niu.moe
2020-11-10T17:15:26Z
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@GNUxeava it may be because you can't know the height of the animals? Like, Look at the picture, imagine they were both, say, 10 cm taller, the equality would still hold upBut yes! It is 150cm!
(DIR) Post #A13tHfzXGJCXf3j7b6 by GNUxeava@fedi.absturztau.be
2020-11-10T17:18:28.406749Z
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@NekoSock yeah right
(DIR) Post #A148GHYy6FPgv85rSi by Paradox@niu.moe
2020-11-10T20:06:15Z
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@NekoSock I gave up doing it the clever way and just eyeballed it.Got 10cm for the turtle and 30cm for the cat, making the table 150cm.Pretty quickly, too.Interesting that the heights of the animals combined is the same as difference between the two provided heights.
(DIR) Post #A1584Vy0um1NHD9nN2 by NekoSock@niu.moe
2020-11-11T07:38:51Z
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@Paradox 150cm is correct!Actually, any animal height give the correct solution as long as they are 20cm apart
(DIR) Post #A158pTlcuYN843l1Lk by Paradox@niu.moe
2020-11-11T07:47:19Z
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@NekoSock Wait shit you're right.Well then this problem needs additional information, unless they're okay with puzzles that have more than one solution.Also I'm curious if there's an intended way to solve it or if they just give out this problem and say "go wild".
(DIR) Post #A159Y6kZKod3i3XkMC by NekoSock@niu.moe
2020-11-11T07:55:23Z
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@Paradox it actually only has one solution, although you can't know the height of the animals, there can only ever be one solution for the table, 150 cmI think the reasoning was this one:"Given image one includes the height of the cat and excludes the height of the turtleand that image two excludes the height of the cat and includes the height of the turtleAdding them together gives us the height of two tables without the cat and the turtle. We can divide this result by 2 to get the height of the table.170+130=300300/2=150
(DIR) Post #A15BKQnaCJFRk9YjgW by Paradox@niu.moe
2020-11-11T08:15:19Z
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@NekoSock I did forget about that. The other heights are not asked about.Also, it'll take me a bit to fully grasp the cleverness of that.