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