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Puzzles

21 December

Today's number is a multiple of three. The average (mean) of all the answers that are multiples of three is a multiple of 193.
Tags: averages, mean

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

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