Advent calendar 2017

9 December

Write the numbers 1 to 15 in a row. Underneath, write the same list without the first and last numbers. Continue this until you have just one number left.
Today's number is the sum of all the numbers you have written.
Tags: numbers


Show me a random puzzle
 Most recent collections 

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

Sunday Afternoon Maths LXV

Cryptic crossnumber #1
Breaking Chocolate
Square and cube endings

List of all puzzles


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


Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2019