mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

14 December

During one day, a digital clock shows times from 00:00 to 23:59. How many times during the day do the four digits shown on the clock add up to 14?

Show answer

Archive

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

Tags

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

Archive

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