mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

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

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

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

Archive

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