Paddy MacMahon
@paddymacmahon.com
Head of Maths at Latymer Upper School
paddymacmahon.com
OCR, Cambridge International and AQA associate, Desmos and Google Colab enthusiast
paddymacmahon.com
OCR, Cambridge International and AQA associate, Desmos and Google Colab enthusiast
Nothing fictitious about it when you're dealing in a rotating frame of reference.
January 10, 2026 at 10:55 AM
Nothing fictitious about it when you're dealing in a rotating frame of reference.
Went to the Paris Metro, apparently.
![A District Line notice about a defected [sic] train.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:c72rtptyi5xnrjw4eni22qr4/bafkreihrpslzlyjd3ibetvqmebr2ha7smdf5cr4kmaaptr7jn6tdve5p3u@jpeg)
January 9, 2026 at 8:20 AM
Went to the Paris Metro, apparently.
Just rain here too...
January 8, 2026 at 10:34 PM
Just rain here too...
Finally got round to following your advice, @themathsbazaar.bsky.social !
January 6, 2026 at 6:21 PM
Finally got round to following your advice, @themathsbazaar.bsky.social !
The Heart in Winter by Kevin Barry.
December 30, 2025 at 8:30 AM
The Heart in Winter by Kevin Barry.
#MathsToday
Finally got hold of the same calculator as I had at school (no idea what happened to mine...)
Like buses, two of them came up on Vinted in quick succession, so I bought them both!
Finally got hold of the same calculator as I had at school (no idea what happened to mine...)
Like buses, two of them came up on Vinted in quick succession, so I bought them both!
December 29, 2025 at 10:00 AM
#MathsToday
Finally got hold of the same calculator as I had at school (no idea what happened to mine...)
Like buses, two of them came up on Vinted in quick succession, so I bought them both!
Finally got hold of the same calculator as I had at school (no idea what happened to mine...)
Like buses, two of them came up on Vinted in quick succession, so I bought them both!
December 23, 2025 at 3:19 PM
I get 2xyz(x-y)(y-z)(z-x)
December 22, 2025 at 5:22 PM
I get 2xyz(x-y)(y-z)(z-x)
December 12, 2025 at 2:58 PM
This is my working for the integration by parts and the substitution:
December 11, 2025 at 10:34 PM
This is my working for the integration by parts and the substitution:
I make it 4050π(√3 -2).
Desmos fails to work out the integral accurately for large k values, but trying smaller k values suggest these expressions match up.
Desmos fails to work out the integral accurately for large k values, but trying smaller k values suggest these expressions match up.
December 11, 2025 at 9:07 PM
I make it 4050π(√3 -2).
Desmos fails to work out the integral accurately for large k values, but trying smaller k values suggest these expressions match up.
Desmos fails to work out the integral accurately for large k values, but trying smaller k values suggest these expressions match up.
Used log tables to do the cosine rule in #ALevelMaths #MathsToday. Can't beat a good logarithm of sines table...
December 10, 2025 at 10:12 AM
Used log tables to do the cosine rule in #ALevelMaths #MathsToday. Can't beat a good logarithm of sines table...
December 3, 2025 at 6:44 AM
Some interview prep after school in #MathsToday
November 27, 2025 at 4:24 PM
Some interview prep after school in #MathsToday
#MathsToday #ALevelMaths
Away for half term for the last couple of weeks... but here's today's Monday Area Problem.
Find the exact value of the green area.
Away for half term for the last couple of weeks... but here's today's Monday Area Problem.
Find the exact value of the green area.
November 3, 2025 at 6:26 PM
#MathsToday #ALevelMaths
Away for half term for the last couple of weeks... but here's today's Monday Area Problem.
Find the exact value of the green area.
Away for half term for the last couple of weeks... but here's today's Monday Area Problem.
Find the exact value of the green area.
October 13, 2025 at 5:16 PM
I saw your labels and thought these represented the actual areas (as in the area of region 1 is 1 unit, of region 2 is 2 units, etc...) which got me thinking that that sort of thing might make a nice problem. Impossible to get regions with those areas using a parabola, but I came up with this:
October 9, 2025 at 6:05 PM
I saw your labels and thought these represented the actual areas (as in the area of region 1 is 1 unit, of region 2 is 2 units, etc...) which got me thinking that that sort of thing might make a nice problem. Impossible to get regions with those areas using a parabola, but I came up with this:
Yeah, I thought this was at the easier end of the spectrum. Although I needed some pen and paper working...!
Gemini pro made a hash of it...
Gemini pro made a hash of it...
October 6, 2025 at 2:43 PM
Yeah, I thought this was at the easier end of the spectrum. Although I needed some pen and paper working...!
Gemini pro made a hash of it...
Gemini pro made a hash of it...
October 6, 2025 at 5:34 AM
In #ALevelMaths #MathsToday we started looking at transformations in terms of how you change the coordinates, using @desmos.com. Next time: encoding (some of) them with matrices.
www.desmos.com/calculator/j...
www.desmos.com/calculator/j...
September 30, 2025 at 4:07 PM
In #ALevelMaths #MathsToday we started looking at transformations in terms of how you change the coordinates, using @desmos.com. Next time: encoding (some of) them with matrices.
www.desmos.com/calculator/j...
www.desmos.com/calculator/j...
#MathsToday #ALevelMaths
Here's Monday's area problem. Find the exact value of the green area.
( #FurtherMaths really, given it's an improper integral...)
Here's Monday's area problem. Find the exact value of the green area.
( #FurtherMaths really, given it's an improper integral...)
September 29, 2025 at 6:36 AM
#MathsToday #ALevelMaths
Here's Monday's area problem. Find the exact value of the green area.
( #FurtherMaths really, given it's an improper integral...)
Here's Monday's area problem. Find the exact value of the green area.
( #FurtherMaths really, given it's an improper integral...)
In #ALevelMaths #MathsToday we saw that if you make the 'wrong' choice for integration by parts with a logarithm involved, you can still proceed to the correct antiderivative.
September 26, 2025 at 11:11 AM
In #ALevelMaths #MathsToday we saw that if you make the 'wrong' choice for integration by parts with a logarithm involved, you can still proceed to the correct antiderivative.
Mine are still there, under this little flag thing's menu.
September 25, 2025 at 5:22 PM
Mine are still there, under this little flag thing's menu.
#MathsToday
Dedication from our girls, preparing for the MOG/MCG at 4:30 on a Wednesday afternoon with @heerpal.bsky.social.
Dedication from our girls, preparing for the MOG/MCG at 4:30 on a Wednesday afternoon with @heerpal.bsky.social.
September 24, 2025 at 3:30 PM
#MathsToday
Dedication from our girls, preparing for the MOG/MCG at 4:30 on a Wednesday afternoon with @heerpal.bsky.social.
Dedication from our girls, preparing for the MOG/MCG at 4:30 on a Wednesday afternoon with @heerpal.bsky.social.