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