mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2018

12 December

These three vertices form a right angled triangle.
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.
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 

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

List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2019