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