mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

Doubling cribbage

Brendan and Adam are playing high stakes cribbage: whoever loses each game must double the other players money. For example, if Brendan has £3 and Adam has £4 then Brendan wins, they will have £6 and £1 respectively.
Adam wins the first game then loses the second game. They then notice that they each have £180. How much did each player start with?

Show answer & extension

If you enjoyed this puzzle, check out Sunday Afternoon Maths LI,
puzzles about doubling, or a random puzzle.

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2025

Advent calendar 2024

Advent calendar 2023

Advent calendar 2022


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2026