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

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