Advent calendar 2016

14 December

In July, I posted the Combining Multiples puzzle.
Today's number is the largest number that cannot be written in the form \(27a+17b\), where \(a\) and \(b\) are positive integers (or 0).


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Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

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


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