Please feel free to ** contact me **.
This pages hosts a few short notes on topics from recreational mathematics.

### Sylvy's mathsy blog

Here is a link to my blog **sylvy's mathsy blog**, which has the slogan `my blog, mostly Maths'.

### Sylvy's puzzle corner

#### $\vdash$ latest puzzle

#### $\vdash$ older puzzles

### miscellany of fun maths

### outreach talks

- puzzle #22: Cute Functions

- puzzle #21: coming soon!
- puzzle #20: coming soon!
- puzzle #19: A tribute to Rubik's Cube
- puzzle #18: Quick Pythagoras
- puzzle #17: Lanbot's Logic Puzzles, courtesy of the Lancashire Science Festival
- puzzle #16: Sections through a cube
- puzzle #15: Optimist, Pessimist
- puzzle #14: Heptagon
- puzzle #13: Pentagon
- puzzle #12: coming soon!
- puzzle #11: All present and correct
- puzzle #10: Round and round (coming soon)
- puzzle #9: Long Division (solution)
- puzzle #8: (coming soon)
- puzzle #7: Factorial, Factorialer, Factorialist
- puzzle #6: the puzzle forest (solution)
- puzzle #5: vertex of parabola
- puzzle #4: continuum chain in $\mathcal{P}(\mathbb{N})$ (solution)
- puzzle #3: Sonic topology (solution part (i), solution part (ii))
- puzzle #2: magic number
- puzzle #1: coins, coins, and more coins

- Reasoning: Knights and Knaves Puzzles
- Reasoning: Pirates and coins
- Analysis/Probability: Coloured balls in jar
- Analysis: A 'mean' question about the sequences of Cesàro means
- Analysis: A fun question about the convergence of series
- Analysis: Tricky Questions, Problem Sheet 1 about convergence and continuity
- Analysis: Accummulation
- Strategy/Set Theory: Hat problems (joint work with Rob Leek)
- Euler characteristic, graphs, solids
- Tennis
- Kittens
- naive calculus
- non-Euclidean geometry
- Rigid structure of Platonic solids, lengths, areas, and volumes
- colourings of solids
- Spinning Platonic Solids
- Conic sections
- Four switches, levers
- Hairy Ball Theorem
- Pancake Theorem, Red and blue points on the plane
- Permutations with jam
- Homogeneity, random graph, $(\mathbb{Q},<)$, back-and-forth

- Puzzles: Hats, hats, and more hats, open day talk, 2018.
- Special Relativity: Space, Time, and Relativity, talk for schools, 2017.
- Puzzles: Hats, hats, and more hats, applicant day talk, 2017.
- Set Theory: Three Portraits of Infinite, talk for schools, 2016.
- Logic: Logic, Puzzles, and Gödel's Incompleteness Theorems, talk for schools, 2014.
- Set Theory: Cantor's Infinities, talk for schools, 2011.