mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2017

17 December

Arrange the digits 1-9 in a 3×3 square so that every row makes a three-digit square number, the first column makes a multiple of 7 and the second column makes a multiple of 4. The number in the third column is today's number.
square
square
square
multiple of 7multiple of 4today's number
Tags: numbers, grids

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2020