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


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


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