Advent calendar 2015

5 December

How many different triangles are there with a perimeter of 100 and each side having an integer length?
(different = not rotations or reflections)


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


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