athos
  • Member for 4 years
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  • Singapore
16 answers
12 votes
6k views
How does one tutor an A-level student past the derivative paradox?
0 votes

Personally I found the calculus is done in two parallel tracks: 1) on how essentially the derivatives and integrals are, and 2) the delta-epsilon language to be rigorous. Sometimes there needs a "...

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15 answers
24 votes
3k views
What books are like Knuth's Surreal Numbers?
0 votes

i'd like to recommend Isaac Newton and his Apple and Murderous maths series by Poskitt Kjartan (Author) and Philip Reeve (Illustrator). Such books explained many basic math concepts in lots of jokes. ...

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4 answers
2 votes
361 views
How can I explain construction of the Bézout's identity to my kid?
0 votes

Just to record what my kid and me went through. First of all, thank you everyone for the great ideas and help! We started from Euclidean Algorithm, explained by folding an A4 paper again and again: ...

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8 answers
3 votes
317 views
How to best explain that the sum of conditional probabilities still sum to 1
-1 votes

After a football game, the team always send a member to a nearby pizza shop to pack food. Different member has different preference on different tastes of pizzas, but whoever was on the duty, sum of ...

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4 answers
9 votes
438 views
Geometrical interpretation of the identity $\operatorname{lcm}(a,b) \operatorname{gcf}(a,b) = ab$
-1 votes

During lockdown we hoarded toilet papers, so I piled up some like this and explained $gcd\cdot lcm=ab$ to my kid.

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