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