# Puzzles

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