Advent calendar 2017

12 December

Put the digits 1 to 9 (using each digit exactly once) in the boxes so that the sums are correct. Today's number is the product of the numbers in the red boxes.
++= 17
+ + +
++= 7
+ + +
++= 21
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


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


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