mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2018

11 December

Today's number is the number \(n\) such that $$\frac{216!\times215!\times214!\times...\times1!}{n!}$$ is a square number.

Show answer

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

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

Archive

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