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



22 December

Today's number is a palindrome. Today's number is also the number of palindromes between 111 and 11111 (including 111 and 11111).

14 December

What is the only palindromic three digit prime number which is also palindromic when written in binary?


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Sunday Afternoon Maths LXVII

Coloured weights
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Advent calendar 2018

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Cryptic crossnumber #2

Sunday Afternoon Maths LXV

Cryptic crossnumber #1
Breaking Chocolate
Square and cube endings

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


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