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Red Five's user avatar
Red Five's user avatar
Red Five's user avatar
Red Five
  • Member for 2 months
  • Last seen this week
  • Last seen in Melbourne, Australia
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4,051
reputation
20k
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16
answers
32
questions
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About

A bit odd.

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37
Score
11
Posts
23
Posts %
20
Score
9
Posts
19
Posts %
17
Score
17
Posts
35
Posts %
8
Score
8
Posts
17
Posts %
7
Score
7
Posts
15
Posts %
6
Score
5
Posts
10
Posts %

Top posts

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question
26
An unusual calculus problem I saw some time ago...
May 13
question
16
The folded pentagon puzzle
Jun 7
question
15
A twisted cryptic crossword puzzle!
Jun 22
question
15
The coloured map puzzle
yesterday
question
14
Riddle of the three coins
Jun 26
question
14
What was my high school mathematics score...?
Jun 8
question
13
Pangrammatic cryptic crossword with a difference.
Jun 25
question
12
Get out... (word puzzle)
May 18
question
11
Riddle of the regatta
May 16
question
11
In the mornings, I do crosswords. In the evenings I...
Jul 1

Top Meta posts

0
4
7
Monthly Topic Challenges re-run: suggest your topic ideas here!
7
Best puzzles of 2026 Q2 (April - June)?

Top network posts

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25
Minimum of $\frac{x^3}{x-6}$ for $x>6$ without using derivative?
8
Solving $p\sin^{4}{\theta}-q\sin^{4}{\phi}=p$ and $p\cos^{4}{\theta}-q\cos^{4}{\phi}=q$ for $\theta$ and $\phi$
8
Finding a more efficient solution to a trigonometric identity problem.
8
Why/how am I over counting here?
7
Eliminating $\theta$ from $x^2+y^2=\frac{x\cos3\theta+y\sin3\theta}{\cos^3\theta}$ and $x^2+y^2=\frac{y\cos3\theta-x\sin3\theta}{\cos^3\theta}$