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

subscribe

Advent calendar 2022

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

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2023

Advent calendar 2022

Advent calendar 2021

Advent calendar 2020
List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2024