Click here to win prizes by solving the puzzle Advent calendar.
Click here to win prizes by solving the puzzle Advent calendar.


Sunday Afternoon Maths LXII

 Posted on 2017-12-24 

What's the star?

In the Christmas tree below, the rectangle, baubles, and the star at the top each contain a number. The square baubles contain square numbers; the triangle baubles contain triangle numbers; and the cube bauble contains a cube number.
The numbers in the rectangles (and the star) are equal to the sum of the numbers below them. For example, if the following numbers are filled in:
then you can deduce the following:
What is the number in the star at the top of this tree?
You can download a printable pdf of this puzzle here.

Show answer

If you enjoyed these puzzles, check out Advent calendar 2019,
puzzles about range, or a random puzzle.


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


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