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

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

Archive

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