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Advent calendar 2016

15 December

A book has 386 pages. What do the page numbers on the two middle pages add up to?
Tags: numbers

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

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