mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2015

20 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.
+-= 8
- - -
+÷= 9
+ ÷ ×
+×= 108
=
6
=
1
=
18
The answer is the product of the digits in the red boxes.

Show answer

Tags: numbers, grids

Archive

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

Tags

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

Archive

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