Can you solve the private eye riddle? - Henri Picciotto
Practice more problem-solving at brilliant.org/TedEd
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As Numberland’s best detective, you thought you’d seen it all. But the desiccated corpses of prominent natural numbers have been showing up all over the city. A lockdown is ordered from sundown to sunrise, and it’s still not enough to stop what can only be described as a vampiric feeding frenzy. Can you figure out why the citizens of Numberland are being attacked? Henri Picciotto shows how.
Lesson by Henri Picciotto, directed by Igor Coric, Artrake Studio.
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View full lesson: ed.ted.com/lessons/can-you-solve-the-feeding-frenzy-riddle-henri-picciotto
Dig deeper with additional resources: ed.ted.com/lessons/can-you-solve-the-feeding-frenzy-riddle-henri-picciotto#digdeeper
Animator's website: www.artrake.com
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Пікірлер: 852
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@DanksterPaws
2 жыл бұрын
I was just thinking about feeding frenzy 👀
@Bibibosh
2 жыл бұрын
This was a little bit terrible compared to other videos from this channel Ive been watching all your videos. This is the worst .. Slime lines Drained numbers. Look forward to the next video.
@thedeltastrat
2 жыл бұрын
@@Bibibosh I mean I liked it... there's only so much you can do with primes numbers after all
@dempzei
2 жыл бұрын
Keep up the good work
@robertjarman3703
2 жыл бұрын
Pie=pi, Eye=i V=5
one of the strangest riddles ive seen on ted ed, but one of the only ones ive gone through smoothly without any trouble!
@jestfullgremblim8002
2 жыл бұрын
I couldn't figure out everything on this one lol, good for you!
@Mohitgett
2 жыл бұрын
I am totally with you on that
@notsure6834
2 жыл бұрын
This one was more dependant on background knowledge to solve
@juanli4153
2 жыл бұрын
Yup
@Zak-tk8wv
Жыл бұрын
Yes
4:45 I love how 45 is casually walking his asterisk.
@cupcakkesprostitvte
Жыл бұрын
its on the 4-minute 45th mark BYEEEE
@anthonyvsrobloxtv4418
Жыл бұрын
45 would definitely be drained because 45/5 = 9
@user-ve1oh9oo6w
Жыл бұрын
@@anthonyvsrobloxtv4418 there are infinite numbers that can be drained the vampire doesn't have time to drain infinite numbers
@nedkelley7364
Жыл бұрын
Oh I see asterisk = at risk 😂
@THEbeetrootsoup
Жыл бұрын
imagine there is a murderer in your town and you arent allowed to walk outside AT ALL. and then your roommate says "aight i gotta walk my pet rq"
Notice how the two characters are a pie (π, probably the most famous irrational number) and an eye (i, an imaginary number). Brilliant.
@qamarat8366
2 жыл бұрын
and e (euler's number) would have been their finance/case managers, presumably.
@felixlee9645
2 жыл бұрын
ikr
@SuperUmizoomi
2 жыл бұрын
I had noticed the pie but hadn't gotten the eye joke, thanks
@okechukwueze9123
2 жыл бұрын
It's actually kinda weird 'cos if their irrational how can they make rational decisions
@juanli4153
2 жыл бұрын
Oh yea
The best part of the video is when they "round up" the vampire with the ceiling function
Literally the only riddle I got all the correct answers to. My confidence in my math skills is restored!
@soonlytaing1708
2 жыл бұрын
I got most of my answers right with this one. Maybe it’s the fact I just woke up but I figured out the first problem has to do with prime numbers, but unsure with the slime line. I got the second one correct tho using a different method
@keeganfisher1900
2 жыл бұрын
Same here, buddy!!
@joeyfrink9691
2 жыл бұрын
I had a feeling all the victims were prime numbers
@mildlydumbperson8465
2 жыл бұрын
How about the laser robot ant things, it was easy.
@GhostieTheML
7 ай бұрын
kinda stumbled on figuring out the last number
I really liked the wordplay in "They round him up", using the mathematical rounding function as his prison.
@m90e
10 ай бұрын
Particularly, his prison is a ceiling function, which always rounds numbers *up.*
What I'm confused about is why 461 had slime between 4 and 6. Take that out, and you get 46 and 1, which still leads to all three digits getting drained. I'd figured out the "primes don't get drained" part, and "slime allows non-prime digits to be isolated in otherwise prime numbers" bit, but the extra slime between 4 and 6 was leading me to believe the slime had some other purpose as well.
@neobullseye1
2 жыл бұрын
My guess is that the vampire also works from left to right. > Check the entire number. Is this a composite number? If so, cool, we're done, drain the entire thing. > If not, isolate the first digit. Is this a composite number? If yes, put a slime line after it and drain it (or if it's followed by one or more zeroes, put a slime line before the first digit that's not a zero). Else, move on. > If not, check the first two digits together. If this is a composite number, put a slime line after it and drain it, and so on. > After a slime line is drawn, treat the next digit in line as if it was the new first digit. > Continue until there are no numbers left to drain, either because all of them are drained or because everything that's left is prime Thus, while 46 is indeed a composite number, 4 is checked first, found out to be a composite number too and is subsequently drained before 46 is even considered. EDIT: My brain was derping when I first wrote this and wrote the wrong terminology. It's fixed now though.
@AxielFan
2 жыл бұрын
I honestly think its just to show that a number can have more than one slime line, which in turn restricts larger (4-digit+) primes from being involved
@spooky2526
2 жыл бұрын
I had the exact same problem, that line seems forced to show that more than one line can be made in the same number but it's quite unecessary
@marinricros9555
2 жыл бұрын
@@neobullseye1 I think you're right, that means the vampire would get it wrong against 631, a prime which can be split into 63 and 1. The vampire would eat the 6, and then he wouldn't be able to eat all of 31
@panie445
2 жыл бұрын
one of the questions asks you to rearrange the slime lines in a number to see if they would still be drained or not. the extra slime is there just to show that the slime could be rearranged in several different ways to drain the victim
If it wasn’t for the starting quote, I wouldn’t have been able to solve it. I actually felt really good realizing that only prime numbers were slimed and the healthy digits were primes!
@CC-jh4kd
2 жыл бұрын
Same
@kohwenxu
2 жыл бұрын
You mean composite numbers were slimed
@Penguinmanereikel
2 жыл бұрын
@@kohwenxu right
@nate_storm
2 жыл бұрын
@@kohwenxu non-primes, not composites. 1 is not a composite.
@JoshRendall
2 ай бұрын
What starting quote?
5:28 “They round him up” very funny
@user-yn6yu2rq8d
3 күн бұрын
😂😂😂
I just saw a riddle coming on youtube and I'm like 'yay! a new riddle!' Thanks a lot for giving us new riddles TedEd!
"Round him up". Would have been funny if the vampire was a number itself and there were clues to reveal its identity.
@itsphoenixingtime
2 жыл бұрын
Well, it clearly enjoys draining non-prime numbers, so I'm thinking it is a very non prime number with multiple divisors, like 360,720,1080,2520 etc
@robertjarman3703
2 жыл бұрын
Its five, V, in Roman numerals.
@zeusthunder6674
2 жыл бұрын
Yeah, they use the ceil() brackets to literally round him up. It's pretty funny
@randomstuff3435
2 жыл бұрын
@@robertjarman3703 And the minion "M" is 1000 in Roman numerals 😂
@qamarat8366
2 жыл бұрын
@@randomstuff3435 Yeah, but that raises the question of why 1000 is being a subordinate to 5.
The visual pun on 'round him up' killed me. 😭
It was the strangest riddle I've seen on ted-ed, but it was a fun riddle. Great video. Hope for more strange and confusing riddles 🤣
@mathguy37
2 жыл бұрын
That we will TOTALLY use in real life
@SunnyMoonwilluploadin
Жыл бұрын
@@mathguy37 its for fun bro
@mathguy37
Жыл бұрын
@@SunnyMoonwilluploadin no this is for this situation irl
The animation team of TED deserves a raise!
@REceladus
2 жыл бұрын
True!
Been watching these for years, and I've never paused it to answer them myself.
I wasn't expecting a riddle this early. Let alone a riddle like this. At least i'm glad i've solved it.
5:29 "They round him up " Hahahah nice one of your best jokes
I realized that this is a 2 for 1 riddle video, keep making these great riddles Ted-Ed!
I finally solved a ted riddle by myself after almost watching all of them. Idk if I should be crying or being happy
I have no idea on whats going on, but I'm enjoying the video. Great stuff.
Before I try to solve it, I love how the P.I. is actually a pie (and pi). And the other P.I. is an actual eye (or maybe i for imaginary number. If that's wrong, I haven't been in a math class in a very long time)
@soozymeow
5 ай бұрын
Mhm! And both pi(an infinite number) and i(square root of a negative number) are irrational numbers which can’t be affected by the vampire!
That setting was sooooooo farfetched and I love it!
I love how when he said “You round him up” the symbols for rounding up appear around the vampire
@catoctober8005
2 жыл бұрын
lol
@catoctober8005
2 жыл бұрын
😂
Wow this was surprisingly easy. Barely took me two minutes. I am unable to solve most of TED Ed's riddles. I'm happy I could solve this one.
This is the first riddle I figured out on my own. Nice video!
Ted Ed is amazing. I learn both math and genetic at the same time
I love the stories behind these riddles
I love that the media person was the symbol of 'division'. Great touch!
Quite the oddball riddle this time, but a very good one with an interesting story nonetheless!
That bit about rounding up almost made me actually laugh.
Pi and i nice! Coming up with such good riddles is really hard and I appreciate the efforts.
This is the best Ted Ed riddle I've ever seen.
Wow, I've actually solved a Ted Ed riddle for once.
Great riddle! Would’ve loved to see a full screen of the first riddle though.
I actually solved both of the riddles just by pure luck!! I'm so ridiculously happy!
1:36 But why did it split the 4 and 6 in 461? Why didn't it just split it as 46 and 1 since it can then eat both parts? 🤨 I considered maybe it's working one digit at a time from left to right but that doesn't work either because then 137 could/would have slime between the 3 and 7, and 2099 would be 2, but then have a 0, in addition, 14 would be 1 and 4. I suspect this is just an oversight. 🤔
@Epaminaidos
2 жыл бұрын
I went down the same path and was pretty disappointed that there was no answer to that.
@richardkurniawan6066
2 жыл бұрын
sometimes the answer is just "because the vampire felt like it"
@Jasmine-bp2yt
2 жыл бұрын
The vampire couldn't see well in the dark.
@Epaminaidos
2 жыл бұрын
@@richardkurniawan6066 With this kind of thinking, the answer "The vampire rolled a dice" would be totally valid.
@richardkurniawan6066
2 жыл бұрын
@@Epaminaidos might aswell be a possibility
This one is one of the weirdest riddles I've seen
This is a great riddle but it's also just a fun story. I love it
I can’t believe it. I finally solve the riddle after 2 weeks of trying to solve your hard thought-provoking riddles!
Discovered Ted X 2 years ago from today. Never regretted!
These riddles make bright side riddles look like one plus one
i imagine how like vampire busts the door to some number party then just stands there thinking where to slime while numbers stay in place and go "oh damn"
This riddle has *primed* my mind well
Loved the "rounding up" visual pun
THIS IS THE ONLY TED ED RIDDLE IVE SOLVED AND IM SO PROUD OF IT!!!!!!!
5:42 Hudson & Watson: Accuse the others of lying Sherlock: The light is off
@Thaplayer1209
Жыл бұрын
Person in charge of the mouse: *makes Sherlock a liar*
1:02 "Pause here if you want to figure it out for yourself!" I am pausing the video to try to understand the problem.
These always crack me up. I think I have only ever figured out one of the riddles I have seen out of 10 LOL
Great job on the "rounding up"!
Awesome and symbolic! I love relating to things.
All three are lying: Watson and Hudson either have to both be telling the truth or both lying since they’re saying the exact same thing. If they’re both honest, then only one of the three can be lying, leading to a paradox. Thus, both are lying, and because we can’t have exactly two people lie (otherwise, they’d be telling the truth), Sherlock must also be lying.
This video really reminded me of why I was interested in math when I was young.
I love the story that goes along with it
This can be 1 hour movie
its always prime numbers with these ted ed riddles i swear
I GOT THIS RIGHT!!!!!!!!!!!!YES!!!!!!!!!!!!!
Omg I love this video, I want more riddle videos In this style like the dragon jousting and coin flip president one.
373 is my new favorite number (it changes every week...)
Does anyone else just watch these and pretend they know what’s going on
@AoifeBowes
25 күн бұрын
Gerald
Oh look, Mr. I from Mario seems to have evolved into a rather dapper gentleman! 😉😆
@PenguinFan1486
2 жыл бұрын
Agreed!
Me: Okay, I REALLY need to get started on my homework- Ted-Ed: *WHO WANTS A NEW RIDDLE VIDEO?!* Me: I do! I do!
This video was really cool and I love it
Honestly did not know one was not considered a prime number, I learned something today
@m90e
11 ай бұрын
Prime numbers have exactly two factors. 1 has only one factor (itself) and 0 has an uncountably infinite amount of factors (*all* numbers), so neither is technically considered prime.
Ted Ed: Can you solve the riddle? Me: Are you going to ask me a riddle? Ted: Maybe? Me: An actual riddle? Not a convoluted math equation? Ted: Mayyyybeeeee? Me: I'll give it a shot. Ted: It's math.
@poeticdavide
Жыл бұрын
My thoughts exactly. 🤣
@Muhahahahaz
11 ай бұрын
Riddle: a question or statement intentionally phrased so as to require ingenuity in ascertaining its answer or meaning, typically presented as a game Math riddles are still riddles, by definition
The name has made this (for me) the hardest to find riddle.
Thanks to the hint at the very beginning 😂 Love 45 walking the dog in 4:45
"They ROUND him UP" *takes the ceiling of V* Very clever!
I got through this riddle smoothly, but it’s because the opening quote was a big giveaway on the first question.
"round him up" using the ceiling function 😂😂🤣🤣
YAY! NEW RIDDLE!!!
I like how this could have been set out as a mathematical puzzle, rather than a murder mystery. Like every single other riddle on this channel.
You NEED to find a riddle that can easily slide into this story!
I loved this riddle
I love the "rounding-up" joke!
Great video
This is the only riddle I've gotten right!
Ted Ed : "can you solve this epic riddle?" Me : "Ulu"
5:29 "they round him up" Oh my god.
The creepiest by far, so cool!
Ceil function for the vampire “You ceil (seal) him up” Love it
Thanks for making a rodle video after over a year
im quite glad I was able to solve this
I have no idea what I just saw but I think it's...cool.
Yay another riddle!
Pi & i ok...that got a chuckle
That “rounding up” joke at 5:29 was clever
They round him up? You… you win this round, TedEd
The Ted-Ed cinematic universe is wild
when you can sucsessfully solve a ted ed riddle without struggling: *visible happiness*
When they describe the problem in these Ted Ed puzzle series, I feel like I am solving a hackerrank problem. Once I was waiting to hear the expected input and output 😅
Eyyyy a new one!
7:"We did it guys! We solved the murders!" 6: "Uh guys, where is 9?" 7: *burps*
Well, that was my wtf moment of the day! My head hurts!
When he said "they round him [the vampire] up" I was so numbers-oriented I was trying to figure out how you round the letter V
This was the only one I ever got correct from this channel
Step 1: Confirm the numbers have green eyes. Step 2: Ask the vampire to leave.
So 5 was the villain. The vampire being V, the roman numeral for 5.
@AnonymousAnonymous-nn5jr
Жыл бұрын
How tho? 5 was kidnapped by M, a minion of V. You can see it here: 5:20
When you solve a Ted Ed riddle: I’m gonna be a detective one day alright
This is the objectively best riddle because of E Y E, and epic gamer Hello Neighbor type beats in the background