Feb 7
[Maths, MPSI, PCSI, L1, L2]
Voici le DS5 des MPSI3 du Lycée Chateaubriand, donné en 2023/24.
Un sujet ambitieux sur les matrices !
#Mathsky #iTeachMaths
colasbd.github.io/ds/DS_5_MP…
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2
17
1,168
17 Nov 2025
2
168
Who said math was scary? 👻
Face your fears and add your own animations to the Desghost in this graph: desmos.com/calculator/mmt5b5…
#iteachmath #mathsky
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9
24
2,002
11 Aug 2025
Am I the only one to know the answer already because I often buy one kilo of yogurts in packages of 8? #MathSky
11 Aug 2025
It's Mental Math Monday with guest Christopher Danielson from Minnesota. How would you mentally calculate 1000÷8?
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1
5
879
10 Jul 2025
2
180
9 Jul 2025
2
178
22 May 2025
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53
18 May 2025
Just added: Testing on Ubuntu Linux with the PPAs provided by the #Macaulay2 project.
github.com/passagemath/passa…
#FOSS #SageMath #MathSky
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43
1 May 2025
Is it possible for a 5x5 grid to be coloured using 2 colours such that no rectangle in the grid has the same colour in all 4 corners?
#math #maths #ProblemSolving #iteachmath #mathsky
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51
25 Apr 2025
Find all combined chords through P that do not share a split product with a different combined chord.
#math #maths #ProblemSolving #iteachmath #mathsky
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35
17 Apr 2025
ALT 8 squares are arranged in a figure. 6 of those squares form a 2x3 rectangle. An additional square is placed on each 3-unit side. Place the numbers 1-8 in the squares such that no two consecutive numbers are touching…even diagonally.
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3
216
12 Apr 2025
What changes to the relationships between the radii would allow us to move or stretch the shapes trace out from the intersection points?
#math #maths #ProblemSolving #Iteachmath #mathsky
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1
29
9 Apr 2025
What relationships between the radii would trace out an ellipse from the intersection points?
#math #maths #ProblemSolving #iteachmath #mathsky
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38
22 Feb 2025
For which natural numbers k is it always possible to turn on all k lights connected in a row regardless of their starting states?
#math #maths #ProblemSolving #iteachmath #mathsky
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55
19 Feb 2025
Prove that i) to turn on all lights with the fewest number of switch flips, each switch can be flipped at most once, and ii) the order of the switch flips makes no difference to the end state of the lights.
#math #maths #ProblemSolving #iteachmath #mathsky
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51
11 Feb 2025
I am writing a paper with no collaborators for the first time in (pauses, looks into the distance, sighs).
I think I have figured out how to prove a small but important to me statement while walking back from the conference to my hotel. #MathSky 1/2
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41
1,303
11 Feb 2025
If we randomly select 3 vertices of a regular polygon with 2n sides to form a triangle, what are the respective probabilities that the center of the hexagon is i) inside, ii) outside, iii) on the edge of the triangle?
#math #maths #ProblemSolving #iteachmath #mathsky
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