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Advent calendar 2015

16 December

Today's number is four thirds of the average (mean) of the answers for 13th, 14th, 15th and 16th December.

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

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