mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2021

15 December

The odd numbers are written in a pyramid.
What is the mean of the numbers in the 19th row?

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

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

Archive

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