mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

Archive

Show me a random puzzle
 Most recent collections 

Tags

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

Archive

Show me a random puzzle
▼ show ▼

2 December

What is the maximum number of lines that can be formed by the intersection of 30 planes?
© Matthew Scroggs 2019