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Click here to win prizes by solving the mscroggs.co.uk puzzle Advent calendar.

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Advent calendar 2015

14 December

What is the only palindromic three digit prime number which is also palindromic when written in binary?

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

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