#mathmadness — Public Fediverse posts

Empfehlungsalgorithmen sind ein elementarer Bestandteil vieler bekannter Online-Dienste. Sie liefern personalisierte Inhalte, können uns aber auch in #Filterblasen gefangen halten, den Zugang zu Vielfalt einschränken und die #Privatsphäre gefährden.

Warum sie aber oftmals nicht wirklich funktionieren und was das alles mit Mathematik zu tun hat, zeigt dieser Artikel recht gut.

https://www.spektrum.de/kolumne/empfehlungsalgorithmen-wie-netflix-uns-den-naechsten-film-vorschlaegt/2168253

#Algorithm #Privacy #Datenschutz #AI #KI
#MathMadness

#Math #TrigThursday #MathMadness #MathMenagerie #NoireSTEMinist #MySTEMIsForTheStreets
One of the legs of a right triangle is 10cm. The other leg is 2cmshorter than the hypotenuse. Determine the measure of the largest non right angle in the triangle.

#Math #TrigThursday #MathMadness #MathMenagerie #NoireSTEMinist #MySTEMIsForTheStreets
One of the legs of a right triangle is 10cm. The other leg is 2cmshorter than the hypotenuse. Determine the measure of the smallest non right angle in the triangle.

#Math #MathMonday #MathMadness #MathMania #MathMenagerie #BlackSTEM
During gym class on Wednesday, the students ran for ¼ of a kilometre. On Thursday, they ran ½ as many kilometres as on Wednesday. On Friday, they ran a 1/3 as many as onThursday. How much did they run on Friday?

#Math #MathMonday #MathMadness #MathMania #MathMenagerie #NoireSTEMinist #PurposefulProfessor
Inger goes to the grocery store and buys 3 squashes that each weigh 500 grams. How many kilograms of squash did Inger buy?

#Math #MathMonday #MathMadness #MathMania #MathMenagerie #NoireSTEMinist #PurposefulProfessor
Kiera wants to make sure she has strong bones, so she drinks 2 litres of milk every week. After 18 days, how many litres of milk will Kiera drink?

#Math #MathMonday #MathMadness #MathMania #MathMenagerie #NoireSTEMinist #PurposefulProfessor
Shad has a lemonade stand and sold 45 cups of lemonade. Each cup was 500 millilitres. How many litres did Shad sell in total?

#Math #MathMonday #MathMadness #MathMania #MathMenagerie #NoireSTEMinist #PurposefulProfessor
A clothing manufacturer uses 1/6 of a bottle of dye to make one pair of pants. The manufacturer used 3 1/2 bottles yesterday. How many pairs of pants did the manufacturer make?

#Math #MathMonday #MathMadness #MathMenagerie #MathMania #NoireSTEMinist #MySTEMIsForTheStreets
Kevin completed ½ of an assignment at school. When he was home that evening, he completed ⅚ of the remaining part. How much does he have left to do?

#Math #MathMonday #MathMadness #MathMania #MathMenagerie Packing school lunches for her kids, Pedro used ⅞ of a package of ham. She also used ½ of a package of turkey. How much more ham than turkey did Pedro use?

#Math #MathMonday #MathMadness #MathMenagerie #MathFun #NoireSTEMinist #PurposefulProfessor #MySTEMIsFortheStreets #BlackTWitter #BlackMastodon #BlackFediverse
Felicia takes 4 hours to paint a room. Katy takes 12 hours to paint the same room. How long will it take for them working together?

#Math #MathMadness #MathMenagerie #MathMania #MathMonday #PreBirthdayShenanigans #NoireSTEMinist #BlackTwitter #Spill #SpillMob #BlackTwitter #BlackMastodon #BlackFediverse
Hezekiah bought 2 freeze cups and a blow pop for $1.75
Tyrone bought 1 freeze cup and 2 blow pops for $1.25
How much are freeze cups?

#Math #MathMadness #MathMenagerie #MathMania #MathMonday #PreBirthdayShenanigans #NoireSTEMinist #BlackTwitter #Spill #SpillMob #BlackTwitter #BlackMastodon #BlackFediverse
Hezekiah bought 2 freeze cups and a blow pop for $1.75
Tyrone bought 1 freeze cup and 2 blow pops for $1.25
How much is a blow pop?

#Math #MathMadness #MathMenagerie #MathMania #MathMonday #PreBirthdayShenanigans #NoireSTEMinist
Devante bought 2 pickles in a bag and 1 peppermint stick for $2.25
Precious bought 3 peppermint sticks and 1 pickle in a bag for $2.00

How much are pickles in a bag?

#Math #MathMadness #MathMenagerie #MathMania #MathMonday #PreBirthdayShenanigans #NoireSTEMinist
Devante bought 2 pickles in a bag and 1 peppermint stick for $2.25
Precious bought 3 peppermint sticks and 1 pickle in a bag for $2.00

How much are peppermint sticks?

#TrigTuesday #Math #MathMania #MathMonopoly #MathMenagerie #MathMadness #BlackTwitter #BlackMastodon #BlackSpoutible #BlackFediverse #BlackSTEM #WomenSTEM

A surveyor wants to know the height of a skyscraper. He places his inclinometer on a tripod 1m from the ground. At a distance of 50m from the skyscraper, he records an angle of elevation of 82∘.

What is the height of the skyscraper?

#TrigTuesday #Math #MathMania #MathMonopoly #MathMenagerie #MathMadness #BlackTwitter #BlackMastodon #BlackSpoutible #BlackFediverse #BlackSTEM #WomenSTEM

A zip wire runs between two posts, 25m apart. The zip wire is at an angle of 10∘ to the horizontal. Calculate the length of the zip wire.

#Math #TrigTuesday #NoireSTEMinist #MySTEMIsForTheStreets #MathMadness #MathMonolopy #MathMenagerie #MathMood
If sides a and b of a right triangle are 8 and 6, find the tangent of the angle opposite side a.

#Math #TrigTuesday #NoireSTEMinist #MySTEMIsForTheStreets #MathMadness #MathMonolopy #MathMenagerie #MathMood
If sides a and b of a right triangle are 8 and 6, find the sine of the angle opposite side a.

#Math #TrigTuesday #NoireSTEMinist #MySTEMIsForTheStreets #MathMadness #MathMonolopy #MathMenagerie #MathMood
If sides a and b of a right triangle are 8 and 6, find the cosine of the angle opposite side a.

@RandomCanuck @ponder Let's go with same track!!!! #BlackTwitter #BlackMastodon #BlackFedi #BlackFediverse #MathMonday #MathMadness #MathMenagerie #MathMania #BlackSTEM #WomenSTEM

#MathMenagerie #MathMotivation #MathMadness #MathMayhem #MathMonopoly 2 trains leave Chicago headed for Indianapolis. Train A travels 20 mph, Train B travels 25 mph. Train A leaves at noon, B leaves at 12:05 pm. What is time & distance when A meet B?
#BlackTwitter #BlackMastodon #BlackFedi #BlackFediverse

#MathMenagerie #MathMotivation #MathMadness #MathMayhem #MathMonopoly 2 trains leave Chicago headed for Indianapolis. Train A travels 20 mph, Train B travels 25 mph. Train A leaves at noon, B leaves at 12:05 pm. What is time & distance when A meet B?

#MathMenagerie #MathMotivation #MathMadness #MathMayhem #MathMonopoly 2 trains leave Chicago headed for Indianapolis. Train A travels 20 mph, Train B travels 25 mph. Train A leaves at noon, B leaves at 12:05 pm. What is time & distance when A meet B?

Passwörter sind für viele ein leidiges Thema. In unserer vernetzten Welt sind sie aber (noch) unverzichtbar, um sich und seine Daten zu schützen.

Dieser Artikel zeigt aus mathematischer Sicht sehr schön, wie Passwörter jenseits von #Phishing geknackt werden können und erklärt auch den Aufbau von Hashfunktionen.

https://www.spektrum.de/kolumne/wie-man-ein-sicheres-passwort-waehlt/2145762

#Datensicherheit #Security #Passwort #Hash #Salt #BruteForce
#MathMadness

„Die Mathematik der Fairness“

Egal ob Menschen oder Maschinen Entscheidungen treffen: Es besteht immer die Gefahr, dass bestimmte Gruppen benachteiligt werden. Aber ist Fairness überhaupt erreichbar?

Dieser Artikel macht den Versuch, die mathematischen Prinzipien, nach denen maschinelle Verfahren Entscheidungen treffen, dynamisch und grafisch darzustellen.

Sehr schön umgesetzt 👍

https://www.spektrum.de/pix/interactive/mathematik-der-fairness/

#Mathematik #Webdesign #Tech #AI #KI #Bias #Benachteiligung #Fairness #MathMadness

Warum hat ein DIN A4 Blatt mit 210x297mm eine so krumme Größe?

Diese Größe wird durch den internationalen Standard für Papierformate (ISO 216), der auf der deutschen Norm DIN 476 basiert, vorgegeben.

Größe: A0=1m²
Seitenverhältnis: 1:√2

Dass dies durchaus Sinn ergibt und Vorteile gegenüber anderen Formaten wie US-Letter (8,5x11 Zoll) hat, zeigt dieser kurze Artikel (auf Englisch) recht gut. 🙂

https://scilogs.spektrum.de/hlf/why-a4-the-mathematical-beauty-of-paper-size/

#Design #Norm #Druck #Briefpapier #Geometrie #MathMadness