2 December

What is the maximum number of lines that can be formed by the intersection of 30 planes?


Show me a random puzzle
 Most recent collections 

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

Sunday Afternoon Maths LXV

Cryptic crossnumber #1
Breaking Chocolate
Square and cube endings

List of all puzzles


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


Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2019