mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2018

23 December

Today's number is the area of the largest area rectangle with perimeter 46 and whose sides are all integer length.

Show answer

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

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

Archive

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