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