mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2021

10 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 largest number you can make using the digits in the red boxes.
++= 20
+ + +
++= 10
+ + +
++= 15
=
7
=
23
=
15

Show answer

Tags: numbers, grids

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2025

Advent calendar 2024

Advent calendar 2023

Advent calendar 2022


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2026