mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2018

17 December

For \(x\) and \(y\) between 1 and 9 (including 1 and 9), I write a number at the co-ordinate \((x,y)\): if \(x\lt y\), I write \(x\); if not, I write \(y\).
Today's number is the sum of the 81 numbers that I have written.

Show answer

Tags: numbers

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2023

Advent calendar 2022

Advent calendar 2021

Advent calendar 2020


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2024