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

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

Archive

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