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