mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2017

8 December

The odd numbers are written in a pyramid.
What is the mean of the numbers in the 23rd row?
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

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

Archive

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