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

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

Archive

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