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).


Show me a random puzzle
 Most recent collections 

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

List of all puzzles


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


Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2019