mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2018

12 December

There are 2600 different ways to pick three vertices of a regular 26-sided shape. Sometime the three vertices you pick form a right angled triangle.
These three vertices form a right angled triangle.
Today's number is the number of different ways to pick three vertices of a regular 26-sided shape so that the three vertices make a right angled triangle.

 

Show answer

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2020