16 December

Arrange the digits 1-9 in a 3×3 square so that: the median number in the first row is 6; the median number in the second row is 3; the mean of the numbers in the third row is 4; the mean of the numbers in the second column is 7; the range of the numbers in the third column is 2, The 3-digit number in the first column is today's number.
median 6
median 3
mean 4
today's numbermean 7range 2

Show answer


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


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


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