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