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