mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

14 December

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 2024

Advent calendar 2023

Advent calendar 2022

Advent calendar 2021


List of all puzzles

Tags

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

Archive

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