mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

XYZ

Which digits \(X\), \(Y\) and \(Z\) fill this sum?
$$ \begin{array}{cccc} &X&Z&Y\\ +&X&Y&Z\\ \hline &Y&Z&X \end{array} $$

Show answer & extension

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2020

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2021