mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

The taxman

In a very strange country, the tax system works as follows.
£1, £2, £3 up to £12 are available.
You pick an amount. You keep this amount, but the taxman takes any factors of it. You cannot pick any amount without a factor.
This continues until you can take no more money. The taxman gets any remaining money.
For example, you might play as follows:
In this example, you end with £22 and the taxman ends with £56.
Is it possible to get more money than the taxman? What is the most you can get?

Show answer & extension

Tags: numbers, money
If you enjoyed this puzzle, check out Sunday Afternoon Maths XLII,
puzzles about money, 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

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

Archive

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