Chang's Math blog

Compilation of all things math --- questions obtained via students' consultation, related math sites. * Do also check out my EduTech contributions at go.gov.sg/changcl

Tuesday, December 30, 2025

Keprekar’s Constant 6174

https://www.instagram.com/reel/DSLB0ntkj3a/?igsh=dWYxdWF3NHJuMDhi

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Posted by ChangCL's Site at 2:01 AM
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Monday, December 22, 2025

Estimation using your hand

Posted by ChangCL's Site at 10:56 AM
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Monday, December 8, 2025

2025 Aggvent Calendar | topic: Measurement


https://andymath.com/2025aggventcalendar/

2025 Aggvent Calendar |
andymath.com



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Posted by ChangCL's Site at 8:09 AM
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Saturday, December 6, 2025

Interesting fractal patterns

https://www.threads.com/@fascinating.fractals/post/DR6kew1km7g?xmt=AQF0GVt6jo66ExbaV83yCJwMAEtAzbM1JBfFh46qN6d3law6P71Pz6Tp_eVc6RqLJW1QEuzR&slof=1

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Posted by ChangCL's Site at 7:22 PM
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How can a square be cut into an equilateral triangle #science #knowledge

https://youtube.com/shorts/CkKFcZkbOKk?si=eFqoMRNLMK0dxzIq

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Posted by ChangCL's Site at 5:34 AM
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      • Estimation using your hand
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