Advent calendar 2019

3 December

Put the digits 1 to 9 (using each digit exactly once) in the boxes so that the sums are correct. The sums should be read left to right and top to bottom ignoring the usual order of operations. For example, 4+3×2 is 14, not 10. Today's number is the largest number you can make with the digits in the red boxes.
++= 21
+ × ×
++= 10
+ ÷ ×
++= 14

Show answer

Tags: numbers, grids


Show me a random puzzle
 Most recent collections 

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

List of all puzzles


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


Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2020