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 

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

Sunday Afternoon Maths LXV

Cryptic crossnumber #1
Breaking Chocolate
Square and cube endings

List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2019