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