Advent calendar 2019

1 December

If you write out the numbers from 1 to 1000 (inclusive), how many times will you write the digit 1?

Show answer


Show me a random puzzle
 Most recent collections 

Advent calendar 2020

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

List of all puzzles


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


Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2021