mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2023

3 December

190 is the smallest multiple of 10 whose digits add up to 10.
What is the smallest multiple of 15 whose digits add up to 15?

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2025

Advent calendar 2024

Advent calendar 2023

Advent calendar 2022


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2026