19 December

The sum of all the numbers in the eighth row of Pascal's triangle.
Clarification: I am starting the counting of rows from 1, not 0. So (1) is the 1st row, (1 1) is the 2nd row, (1 2 1) is the 3rd row, etc.


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


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


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