Advent calendar 2015

4 December

Put the digits 1 to 9 (using each digit exactly once) in the boxes so that the sums reading across and down 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.
-+= -4
+ + +
-÷= -1
- ÷ ×
-×= -30
The answer is the product of the digits in the red boxes.

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


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


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