mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

The sixth cent

You toss 6 fair coins, and I toss 5 fair coins. What is the probability that you get more heads than I do?

Show answer & extension

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

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

Archive

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