mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

Exact change

In the UK, the coins less than £1 are 1p, 2p, 5p, 10p, 20p and 50p. How many coins would I need to carry in my pocket so that I could make any value from 1p to 99p?
In the US, the coins less than $1 are 1¢, 5¢, 10¢, 25¢. How many coins would I need to carry in my pocket so that I could make any value from 1¢ to 99¢?

Show answer & extension

Tags: money, numbers
If you enjoyed this puzzle, check out Sunday Afternoon Maths XXIV,
puzzles about money, or a random puzzle.

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2024

Advent calendar 2023

Advent calendar 2022

Advent calendar 2021


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2025