In the diagram, B, A, C, D, E, F, G, H, I, J, K and L are the vertices of a regular dodecagon and B, A, M, N, O and P are the vertices of a regular hexagon.
Show that A, M and E lie on a straight line.

Show answer & extension


Show me a random puzzle
 Most recent collections 

Advent calendar 2020

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

List of all puzzles


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


Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2021