Advent calendar 2017

11 December

Two more than today's number is the reverse of two times today's number.


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


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