22 December

22 is two times an odd number. Today's number is the mean of all the answers on days (including today) that are two times an odd number.
Clarification: You are taking the mean for answers on days that are two times an odd numbers; ie. the days are two times odd, not the answers.

16 December

Today's number is four thirds of the average (mean) of the answers for 13th, 14th, 15th and 16th December.

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


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


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