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


Advent calendar 2018

18 December

There are 6 terms in the expansion of \((x+y+z)^2\):
Today's number is number of terms in the expansion of \((x+y+z)^{16}\).

Show answer

Tags: algebra


Show me a random puzzle
 Most recent collections 

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

Sunday Afternoon Maths LXV

Cryptic crossnumber #1
Breaking Chocolate
Square and cube endings

List of all puzzles


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


Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2019