mscroggs.co.uk
mscroggs.co.uk
blog     puzzles     academic     talks     contact     subscribe↓ ☰ ↓

subscribe

Puzzles

 Showing puzzles tagged "pentagons". Show all puzzles. 

14 December

This puzzle was part of the 2022 Advent calendar.
All 2022 advent puzzles ~ More information
Holly draws a line of connected regular pentagons like this:
She continues the pattern until she has drawn 204 pentagons. The perimeter of each pentagon is 5. What is the perimeter of her line of pentagons?

Show answer

Tags: pentagons
 End of puzzles. 

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2024

Advent calendar 2023

Advent calendar 2022

Advent calendar 2021
List of all puzzles

Tags

albgebra gerrymandering ave area consecutive numbers algebra complex numbers sets dice doubling hexagons chalkdust crossnumber elections sums spheres regular shapes perimeter speed differentiation consecutive integers axes binary factorials ellipses wordplay graphs square numbers percentages probabilty probability volume decahedra digital clocks tournaments palindromes floors scales numbers grids multiplication circles cryptic crossnumbers parabolas range taxicab geometry rugby irreducible numbers products folding tube maps functions determinants pascal's triangle partitions number sum to infinity shapes cubics geometric means means 2d shapes remainders cryptic clues matrices the only crossnumber balancing dodecagons logic digital products division chess addition mean clocks lines bases games planes proportion averages 3d shapes polygons medians rectangles chocolate expansions crossnumbers grids factors time tangents christmas triangle numbers angles perfect numbers geometric mean money calculus star numbers arrows cube numbers sequences pentagons tiling even numbers quadratics cards multiples coordinates people maths shape neighbours menace colouring integers digits surds quadrilaterals routes geometry combinatorics fractions square grids coins advent books indices sport prime numbers triangles polynomials dates dominos unit fractions crosswords median odd numbers numbers powers symmetry trigonometry integration squares square roots

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2025