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


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