# Puzzles

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#### Sunday Afternoon Maths LXVII

Coloured weightsNot Roman numerals

#### Advent calendar 2018

#### Sunday Afternoon Maths LXVI

Cryptic crossnumber #2#### Sunday Afternoon Maths LXV

Cryptic crossnumber #1Breaking Chocolate

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