List questions from problem-solving

Published on 12 Apr 2026 - 21:34

505

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Evaluating $\sum_{n=0}^{15}(1.6^n-12n+1)$. What am I doing wrong?

Published on 16 Apr 2026 - 10:30

36

Views

Solving system of linear equations with two variables

Published on 15 Apr 2026 - 10:09

49

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Solve: $4(9^x)+3(4^x)=13(6^x)$

Published on 17 Apr 2026 - 0:45

61

Views

solving exponentiation equation $4^t=2^t+K$

Published on 16 Apr 2026 - 4:25

248

Views

In the figure $\Delta ABC$ and $\Delta DEF$ are both equilateral and $AB = 8$ cm, $DE = 3$ cm.

Published on 12 Apr 2026 - 4:35

118

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Follow-up 'Diophantine' question: extrapolating to the general case

Published on 14 Apr 2026 - 20:19

68

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Cutting off tetrahedral corners off a cube...

Published on 14 Apr 2026 - 19:39

64

Views

Finding the total area of different semi circles within a square.

Published on 16 Apr 2026 - 7:44

723

Views

In an isosceles right $\Delta ABC$, $\angle B = 90^\circ$. AD is the median on BC. Let $AB = BC = a$.

Published on 25 Mar 2026 - 19:06

278

Views

Expected Value of a 2-Player Dice Game

Published on 11 Apr 2026 - 4:01

79

Views

Find the general term for sequence ($a_n$) which equates to the recursive equation $a_{n+3}=5a_{n+2}-7a_{n+1}+3a_n+16+24n^2+36*3^n$

Published on 16 Apr 2026 - 12:12

50

Views

Finding angles determined by given degrees

Published on 12 Apr 2026 - 13:28

81

Views

Showing $\sqrt{\frac{1-\cos20^\circ}{1+\cos40^\circ}} =\frac{\cos80^\circ}{\cos20^\circ}$

Published on 15 Apr 2026 - 22:10

31

Views

Are there any techniques for streamlining a mathematical model?

Published on 08 Apr 2026 - 4:06

List Question

Combinatorics question - why am I over counting?

Evaluating $\sum_{n=0}^{15}(1.6^n-12n+1)$. What am I doing wrong?

Solving system of linear equations with two variables

Solve: $4(9^x)+3(4^x)=13(6^x)$

solving exponentiation equation $4^t=2^t+K$

In the figure $\Delta ABC$ and $\Delta DEF$ are both equilateral and $AB = 8$ cm, $DE = 3$ cm.

Follow-up 'Diophantine' question: extrapolating to the general case

Cutting off tetrahedral corners off a cube...

Finding the total area of different semi circles within a square.

In an isosceles right $\Delta ABC$, $\angle B = 90^\circ$. AD is the median on BC. Let $AB = BC = a$.

Expected Value of a 2-Player Dice Game

Find the general term for sequence ($a_n$) which equates to the recursive equation $a_{n+3}=5a_{n+2}-7a_{n+1}+3a_n+16+24n^2+36*3^n$

Finding angles determined by given degrees

Showing $\sqrt{\frac{1-\cos20^\circ}{1+\cos40^\circ}} =\frac{\cos80^\circ}{\cos20^\circ}$

Are there any techniques for streamlining a mathematical model?

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