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


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© Matthew Scroggs 2019