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