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Advent calendar 2016

7 December

Put the digits 1 to 9 (using each digit once) in the boxes so that the three digit numbers formed (reading left to right and top to bottom) have the desired properties written by their rows and columns.
multiple of 25
today's number
all digits even
multiple of 91multiple of 7cube number
Tags: grids, numbers

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

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