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