mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2017

15 December

The string ABBAABBBBB is 10 characters long, contains only A and B, and contains at least three As.
Today's number is the number of different 10 character strings of As and Bs that have at least three As.

Show answer

Tags: numbers

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

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

Archive

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