Durtles
@makeaproblem.bsky.social
Math book author and problem collector.
Books: https://dandelioneducation.ca/books/
YouTube: https://www.youtube.com/@MakeaProblem
Books: https://dandelioneducation.ca/books/
YouTube: https://www.youtube.com/@MakeaProblem
Pinned
Durtles
@makeaproblem.bsky.social
· Sep 2
Aight, in an attempt to make #MathSky feel less broadcast-y and more community-like (inspired by @jjnevis.com ), let's try an intro post. Drop your answers below:
1. What part of the world are you in?
2. What's your favourite math branch/topic/problem and why?
Say hi to those with similar answers.
1. What part of the world are you in?
2. What's your favourite math branch/topic/problem and why?
Say hi to those with similar answers.
I just realized I do the pokemon thing but for math problems. 🤔 I catch them and "train" them until they evolve into a book or a video. 😅
September 24, 2025 at 7:44 PM
I just realized I do the pokemon thing but for math problems. 🤔 I catch them and "train" them until they evolve into a book or a video. 😅
I made this week's problem into a video too.
youtu.be/elp1RSD8Tq4
Sorry to take another break from the posting schedule so soon, but we have a family trip coming up. See you again in a month or so. ☺️
#math #maths #ProblemSolving #iteachmath #MathSky
youtu.be/elp1RSD8Tq4
Sorry to take another break from the posting schedule so soon, but we have a family trip coming up. See you again in a month or so. ☺️
#math #maths #ProblemSolving #iteachmath #MathSky
September 21, 2025 at 5:43 PM
I made this week's problem into a video too.
youtu.be/elp1RSD8Tq4
Sorry to take another break from the posting schedule so soon, but we have a family trip coming up. See you again in a month or so. ☺️
#math #maths #ProblemSolving #iteachmath #MathSky
youtu.be/elp1RSD8Tq4
Sorry to take another break from the posting schedule so soon, but we have a family trip coming up. See you again in a month or so. ☺️
#math #maths #ProblemSolving #iteachmath #MathSky
f). How many different arrangements of the name cards for n people (where n is odd) are there that have this property?
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
September 20, 2025 at 3:15 PM
f). How many different arrangements of the name cards for n people (where n is odd) are there that have this property?
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
e). Prove or disprove that no arrangement of name cards work for even numbers of people.
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
September 19, 2025 at 3:15 PM
e). Prove or disprove that no arrangement of name cards work for even numbers of people.
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
d). Prove that the reverse order arrangement of name cards always work for odd numbers of people.
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
September 18, 2025 at 3:15 PM
d). Prove that the reverse order arrangement of name cards always work for odd numbers of people.
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
c). How many different arrangements of the name cards for 4 people are there that have this property? 6 people? 7 people?
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
September 17, 2025 at 3:15 PM
c). How many different arrangements of the name cards for 4 people are there that have this property? 6 people? 7 people?
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
I made these books for my own kids. If you're a math problem enthusiast and have a child in your life with whom you want to share that love of math, feel free to check them out.
mybook.to/hTtGl
#mathsky #iteachmath #math #maths #ProblemSolving #MarketingMonday (I hesitated, so it's not Monday..)
mybook.to/hTtGl
#mathsky #iteachmath #math #maths #ProblemSolving #MarketingMonday (I hesitated, so it's not Monday..)
September 16, 2025 at 6:57 PM
I made these books for my own kids. If you're a math problem enthusiast and have a child in your life with whom you want to share that love of math, feel free to check them out.
mybook.to/hTtGl
#mathsky #iteachmath #math #maths #ProblemSolving #MarketingMonday (I hesitated, so it's not Monday..)
mybook.to/hTtGl
#mathsky #iteachmath #math #maths #ProblemSolving #MarketingMonday (I hesitated, so it's not Monday..)
b). How many different arrangements of the name cards for 5 people are there that have this property?
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
September 16, 2025 at 3:15 PM
b). How many different arrangements of the name cards for 5 people are there that have this property?
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
Happy Monday! This problem is inspired by the 1975 CMO Q6ii
Here are 5 people at a meeting. Notice if we place their name cards in reverse order, no matter how we turn the table, only one person will have the right name card at any time.
a). Find a different arrangement for 5 people like this.
Here are 5 people at a meeting. Notice if we place their name cards in reverse order, no matter how we turn the table, only one person will have the right name card at any time.
a). Find a different arrangement for 5 people like this.
September 15, 2025 at 3:15 PM
Happy Monday! This problem is inspired by the 1975 CMO Q6ii
Here are 5 people at a meeting. Notice if we place their name cards in reverse order, no matter how we turn the table, only one person will have the right name card at any time.
a). Find a different arrangement for 5 people like this.
Here are 5 people at a meeting. Notice if we place their name cards in reverse order, no matter how we turn the table, only one person will have the right name card at any time.
a). Find a different arrangement for 5 people like this.
So I made a video on this week's problem too.
youtu.be/zYsNc0oJKo8
#math #maths #ProblemSolving #iteachmath #mathsky
youtu.be/zYsNc0oJKo8
#math #maths #ProblemSolving #iteachmath #mathsky
September 14, 2025 at 6:20 PM
So I made a video on this week's problem too.
youtu.be/zYsNc0oJKo8
#math #maths #ProblemSolving #iteachmath #mathsky
youtu.be/zYsNc0oJKo8
#math #maths #ProblemSolving #iteachmath #mathsky
f). How many different arrangements of mismatching all name cards are there for n people around the table? (rotating the table counts as the same arrangement)
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
September 13, 2025 at 3:15 PM
f). How many different arrangements of mismatching all name cards are there for n people around the table? (rotating the table counts as the same arrangement)
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
e). How many different arrangements of mismatching all name cards are there for 5 people around the table? (rotating the table counts as the same arrangement)
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
September 12, 2025 at 3:15 PM
e). How many different arrangements of mismatching all name cards are there for 5 people around the table? (rotating the table counts as the same arrangement)
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
d). How many different arrangements of mismatching all name cards are there for 4 people around the table? (rotating the table counts as the same arrangement)
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
September 11, 2025 at 3:15 PM
d). How many different arrangements of mismatching all name cards are there for 4 people around the table? (rotating the table counts as the same arrangement)
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
c). For which numbers of people is it always possible to rotate the table such that at least 2 people have the right name cards if they all start out mismatched?
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
September 10, 2025 at 3:15 PM
c). For which numbers of people is it always possible to rotate the table such that at least 2 people have the right name cards if they all start out mismatched?
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
b). With 5 people at the meeting, sketch a way to place the name cards such that they’re all mismatched. Can you always rotate the table such that at least 2 people have the right name cards?
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
September 9, 2025 at 3:15 PM
b). With 5 people at the meeting, sketch a way to place the name cards such that they’re all mismatched. Can you always rotate the table such that at least 2 people have the right name cards?
#math #maths #ProblemSolving #iteachmath #mathsky
#math #maths #ProblemSolving #iteachmath #mathsky
Happy Monday! This week's problem's inspired by the 1975 CMO Q6i.
a). 4 people (ABCD) are at a table for a meeting. Sketch a way to place the name cards (abcd) such that they’re all mismatched. Then rotate the table such that at least 2 people have the right name cards. Is this always possible?
a). 4 people (ABCD) are at a table for a meeting. Sketch a way to place the name cards (abcd) such that they’re all mismatched. Then rotate the table such that at least 2 people have the right name cards. Is this always possible?
September 8, 2025 at 3:15 PM
Happy Monday! This week's problem's inspired by the 1975 CMO Q6i.
a). 4 people (ABCD) are at a table for a meeting. Sketch a way to place the name cards (abcd) such that they’re all mismatched. Then rotate the table such that at least 2 people have the right name cards. Is this always possible?
a). 4 people (ABCD) are at a table for a meeting. Sketch a way to place the name cards (abcd) such that they’re all mismatched. Then rotate the table such that at least 2 people have the right name cards. Is this always possible?
So I made a video on this week's problem.
youtu.be/MBl-Iy0Ykoo
#math #maths #ProblemSolving #iteachmath #mathsky
youtu.be/MBl-Iy0Ykoo
#math #maths #ProblemSolving #iteachmath #mathsky
September 7, 2025 at 4:03 PM
So I made a video on this week's problem.
youtu.be/MBl-Iy0Ykoo
#math #maths #ProblemSolving #iteachmath #mathsky
youtu.be/MBl-Iy0Ykoo
#math #maths #ProblemSolving #iteachmath #mathsky
September 6, 2025 at 3:15 PM
September 5, 2025 at 3:15 PM
September 4, 2025 at 3:15 PM
September 3, 2025 at 3:15 PM
Aight, in an attempt to make #MathSky feel less broadcast-y and more community-like (inspired by @jjnevis.com ), let's try an intro post. Drop your answers below:
1. What part of the world are you in?
2. What's your favourite math branch/topic/problem and why?
Say hi to those with similar answers.
1. What part of the world are you in?
2. What's your favourite math branch/topic/problem and why?
Say hi to those with similar answers.
September 2, 2025 at 9:38 PM
Aight, in an attempt to make #MathSky feel less broadcast-y and more community-like (inspired by @jjnevis.com ), let's try an intro post. Drop your answers below:
1. What part of the world are you in?
2. What's your favourite math branch/topic/problem and why?
Say hi to those with similar answers.
1. What part of the world are you in?
2. What's your favourite math branch/topic/problem and why?
Say hi to those with similar answers.
September 2, 2025 at 3:15 PM
Happy Labour Day! This week's problem is inspired by the 1975 CMO Q5.
a). Find θ.
#math #maths #ProblemSolving #iteachmath #mathsky
a). Find θ.
#math #maths #ProblemSolving #iteachmath #mathsky
September 1, 2025 at 3:15 PM
Happy Labour Day! This week's problem is inspired by the 1975 CMO Q5.
a). Find θ.
#math #maths #ProblemSolving #iteachmath #mathsky
a). Find θ.
#math #maths #ProblemSolving #iteachmath #mathsky
So the kidlets have been on summer vacation, and I've realized I can't get much done when they're around all day. 😅 I'm pausing the update schedule until school starts again. Here's a video I published before instead. 🙂
youtu.be/a_4bwkH_NK0
#math #maths #ProblemSolving #iteachmath #mathsky
youtu.be/a_4bwkH_NK0
#math #maths #ProblemSolving #iteachmath #mathsky
Demystifying the Gambler's Fallacy
YouTube video by Make a Problem
youtu.be
July 20, 2025 at 8:01 PM
So the kidlets have been on summer vacation, and I've realized I can't get much done when they're around all day. 😅 I'm pausing the update schedule until school starts again. Here's a video I published before instead. 🙂
youtu.be/a_4bwkH_NK0
#math #maths #ProblemSolving #iteachmath #mathsky
youtu.be/a_4bwkH_NK0
#math #maths #ProblemSolving #iteachmath #mathsky