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