Click here to win prizes by solving the puzzle Advent calendar.
Click here to win prizes by solving the puzzle Advent calendar.


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


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