mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2022

6 December

There are 21 three-digit integers whose digits are all non-zero and whose digits add up to 8.
How many positive integers are there whose digits are all non-zero and whose digits add up to 8?

Show answer & extension

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

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

Archive

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