2 December

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


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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

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


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