List questions from education

Published on 25 Mar 2015 - 20:27

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How to explain to a 14-year-old that $\sqrt{(-3)^2}$ isn't $-3$?

Published on 31 Mar 2026 - 17:49

163

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If negative of negative (--) = positive then why not positive of positive(++)= negative

Published on 30 Mar 2026 - 10:13

266

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Teaching cardinality

Published on 31 Mar 2015 - 20:08

97

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Finding extrema of a cubic equation

Published on 03 Apr 2015 - 3:14

1.6k

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What does the solution of a PDE represent?

Published on 25 Mar 2026 - 15:39

1.6k

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How should a DE course be re-written, if Gian-Carlo Rota is correct?

Published on 03 Apr 2015 - 17:51

442

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Has the age at which we teach Mathematics changed over the last two centuries?

Published on 04 Apr 2015 - 5:02

79

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Help needed for a step by step calculation

Published on 04 Apr 2015 - 10:01

2.3k

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A pedagogical proof that 9's can be ignored when calculating digital roots

Published on 05 Apr 2015 - 20:35

193

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Examples of categories which appear naturally without objects

Published on 29 Mar 2026 - 15:53

240

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Mathematics problems clock

Published on 08 Apr 2015 - 14:16

7.3k

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Importance of Exercises in Mathematics for Self-Studying

Published on 24 Feb 2026 - 1:36

904

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Pursuing Maths after Majoring in Engineering

Published on 11 Apr 2015 - 15:02

3.9k

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Monotonous function or monotonic function

Published on 12 Apr 2015 - 13:48

List Question

Find Matrix $A^{50}$?

How to explain to a 14-year-old that $\sqrt{(-3)^2}$ isn't $-3$?

If negative of negative (--) = positive then why not positive of positive(++)= negative

Teaching cardinality

Finding extrema of a cubic equation

What does the solution of a PDE represent?

How should a DE course be re-written, if Gian-Carlo Rota is correct?

Has the age at which we teach Mathematics changed over the last two centuries?

Help needed for a step by step calculation

A pedagogical proof that 9's can be ignored when calculating digital roots

Examples of categories which appear naturally without objects

Mathematics problems clock

Importance of Exercises in Mathematics for Self-Studying

Pursuing Maths after Majoring in Engineering

Monotonous function or monotonic function

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