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