𝐍𝐞𝐰 𝐠𝐚𝐦𝐞! Crossnumber is like a mini-crossword… but solved 𝐞𝐧𝐭𝐢𝐫𝐞𝐥𝐲 𝐰𝐢𝐭𝐡 𝐝𝐢𝐠𝐢𝐭𝐬.
A fresh 5×5 drops every Sunday. Race the clock, climb the leaderboard, compete with your friends.
Play: coffeefirst.games/crossnumber ☕️
#Crossnumber #Puzzle #Crossword #BrainTeaser #IndieDev #WQuers #NYTMini #NYTGames
A fresh 5×5 drops every Sunday. Race the clock, climb the leaderboard, compete with your friends.
Play: coffeefirst.games/crossnumber ☕️
#Crossnumber #Puzzle #Crossword #BrainTeaser #IndieDev #WQuers #NYTMini #NYTGames
Crossnumber: A Crossword with Digits
A unique mini-crossword puzzle where all the answers are numbers!
coffeefirst.games
October 12, 2025 at 8:11 PM
𝐍𝐞𝐰 𝐠𝐚𝐦𝐞! Crossnumber is like a mini-crossword… but solved 𝐞𝐧𝐭𝐢𝐫𝐞𝐥𝐲 𝐰𝐢𝐭𝐡 𝐝𝐢𝐠𝐢𝐭𝐬.
A fresh 5×5 drops every Sunday. Race the clock, climb the leaderboard, compete with your friends.
Play: coffeefirst.games/crossnumber ☕️
#Crossnumber #Puzzle #Crossword #BrainTeaser #IndieDev #WQuers #NYTMini #NYTGames
A fresh 5×5 drops every Sunday. Race the clock, climb the leaderboard, compete with your friends.
Play: coffeefirst.games/crossnumber ☕️
#Crossnumber #Puzzle #Crossword #BrainTeaser #IndieDev #WQuers #NYTMini #NYTGames
Sunday funday - a new Crossnumber puzzle just dropped! Crossword enthusiasts, how do you fare when the answers are numbers instead of words! Clues: Jenny's number, keys on a standard piano, Maine's area code, & more!
coffeefirst.games/crossnumber
#crossword #puzzle #nytmini #nytcrossword #game
coffeefirst.games/crossnumber
#crossword #puzzle #nytmini #nytcrossword #game
October 19, 2025 at 2:42 PM
Sunday funday - a new Crossnumber puzzle just dropped! Crossword enthusiasts, how do you fare when the answers are numbers instead of words! Clues: Jenny's number, keys on a standard piano, Maine's area code, & more!
coffeefirst.games/crossnumber
#crossword #puzzle #nytmini #nytcrossword #game
coffeefirst.games/crossnumber
#crossword #puzzle #nytmini #nytcrossword #game
NEW CROSSNUMBER ALERT!
🦂🚨🦂 New Chalkdust alert! 🦂🚨🦂
DNA origami, tracks and an interview with El Nombre feature in our AW25 issue! Plus all your favourite puzzles & columns.
Read the entire new issue now at
chalkdustmagazine.com
DNA origami, tracks and an interview with El Nombre feature in our AW25 issue! Plus all your favourite puzzles & columns.
Read the entire new issue now at
chalkdustmagazine.com
Chalkdust: Read Issue 22 now
A magazine for the mathematically curious. Issue 22 now available: DNA origami, tracks and an interview with El Nombre feature in our AW25 issue! Plus all your favourite puzzles & columns.
chalkdustmagazine.com
November 17, 2025 at 1:00 PM
NEW CROSSNUMBER ALERT!
Crossnumber: A Crossword with Digits
A unique mini-crossword puzzle where all the answers are numbers!
coffeefirst.games
November 24, 2025 at 12:11 PM
A bit easier than the last one for me
Crossnumber #4 — 1:21
#coffeefirstgames #crossnumber
coffeefirst.games/crossnumber ☕
Crossnumber #4 — 1:21
#coffeefirstgames #crossnumber
coffeefirst.games/crossnumber ☕
Crossnumber: A Crossword with Digits
A unique mini-crossword puzzle where all the answers are numbers!
coffeefirst.games
October 26, 2025 at 11:39 AM
A bit easier than the last one for me
Crossnumber #4 — 1:21
#coffeefirstgames #crossnumber
coffeefirst.games/crossnumber ☕
Crossnumber #4 — 1:21
#coffeefirstgames #crossnumber
coffeefirst.games/crossnumber ☕
coffeefirst.games ☕
Sudoku Shift #111
4×4 - 0:13.6
6×6 - 0:40.9
9×9 - 1:23.6
Total - 2:18.2
Yearly Daily - Oct 12th
0 ✨ • 11⬇️ • 9⬇️ • 1⬆️ • 12⬇️ • 0 ✨
67 lives left ✨
Crossnumber #2 — 1:03
#puzzles #wquer #sudoku #guesstheyear #crossword #nytgames #dailygames
Sudoku Shift #111
4×4 - 0:13.6
6×6 - 0:40.9
9×9 - 1:23.6
Total - 2:18.2
Yearly Daily - Oct 12th
0 ✨ • 11⬇️ • 9⬇️ • 1⬆️ • 12⬇️ • 0 ✨
67 lives left ✨
Crossnumber #2 — 1:03
#puzzles #wquer #sudoku #guesstheyear #crossword #nytgames #dailygames
CoffeeFirst.games ☕
Espresso-sized puzzles perfect for your daily routine, just like your morning coffee.
coffeefirst.games
October 13, 2025 at 3:00 AM
coffeefirst.games ☕
Sudoku Shift #111
4×4 - 0:13.6
6×6 - 0:40.9
9×9 - 1:23.6
Total - 2:18.2
Yearly Daily - Oct 12th
0 ✨ • 11⬇️ • 9⬇️ • 1⬆️ • 12⬇️ • 0 ✨
67 lives left ✨
Crossnumber #2 — 1:03
#puzzles #wquer #sudoku #guesstheyear #crossword #nytgames #dailygames
Sudoku Shift #111
4×4 - 0:13.6
6×6 - 0:40.9
9×9 - 1:23.6
Total - 2:18.2
Yearly Daily - Oct 12th
0 ✨ • 11⬇️ • 9⬇️ • 1⬆️ • 12⬇️ • 0 ✨
67 lives left ✨
Crossnumber #2 — 1:03
#puzzles #wquer #sudoku #guesstheyear #crossword #nytgames #dailygames
I had a ton of fun, and only minor frustration, doing the crossnumber for issue 20 while I was proctoring my final. There was very little proctoring and a lot of puzzling.
Chalkdust issue 20 is out now!
Our latest issue features spirographs, complex triangles and a lot of ants, plus all your favourite regulars.
You can read it now at chalkdustmagazine.co...
Our latest issue features spirographs, complex triangles and a lot of ants, plus all your favourite regulars.
You can read it now at chalkdustmagazine.co...
Read Issue 20 now! - Chalkdust
A magazine for the mathematically curious. Issue 20 now available: Spirographs, complex triangles and a lot of ants feature in our AW24 issue! Plus all your favourite puzzles & columns.
chalkdustmagazine.com
December 13, 2024 at 11:12 PM
I had a ton of fun, and only minor frustration, doing the crossnumber for issue 20 while I was proctoring my final. There was very little proctoring and a lot of puzzling.
Have been distracted and have only just done Crossnumber #20. Really nice finish to it.
March 18, 2025 at 4:53 PM
Have been distracted and have only just done Crossnumber #20. Really nice finish to it.
Also the issue 21 crossnumber is one of the most ridiculous I've written so far. Good luck! chalkdustmagazine.com/regulars/cro...
March 17, 2025 at 9:05 AM
Also the issue 21 crossnumber is one of the most ridiculous I've written so far. Good luck! chalkdustmagazine.com/regulars/cro...
Izzy Whistlecroft likes hand-made logic puzzles, e.g. Toketa, Pulze, World Puzzle Grand Prix (with a 3D Sudoku), GMPuzzles, Sudokuvania... #mathsjam #puzzles
Has anyone told her about @chalkdustmag.bsky.social's hand-made crossnumber?
Has anyone told her about @chalkdustmag.bsky.social's hand-made crossnumber?
November 22, 2025 at 4:14 PM
Izzy Whistlecroft likes hand-made logic puzzles, e.g. Toketa, Pulze, World Puzzle Grand Prix (with a 3D Sudoku), GMPuzzles, Sudokuvania... #mathsjam #puzzles
Has anyone told her about @chalkdustmag.bsky.social's hand-made crossnumber?
Has anyone told her about @chalkdustmag.bsky.social's hand-made crossnumber?
@mscroggs.co.uk Have taken a second swing at the current crossnumber and have admitted defeat. It's a bit too good for me. First one that I've not been able to finish. Am probably missing something clever.
September 21, 2025 at 10:30 AM
@mscroggs.co.uk Have taken a second swing at the current crossnumber and have admitted defeat. It's a bit too good for me. First one that I've not been able to finish. Am probably missing something clever.
Oo, goody, a new @chalkdustmag so I can spend the afternoon with the crossnumber, cursing the name of @mscroggs
chalkdust (@chalkdustmag@mathstodon.xyz)
144 Posts, 6 Following, 322 Followers · A magazine for the mathematically curious
mathstodon.xyz
March 17, 2025 at 12:34 PM
Oo, goody, a new @chalkdustmag so I can spend the afternoon with the crossnumber, cursing the name of @mscroggs
Bluesky now has over 10 million users, and I was #1,606,429!
Me when I’m a cryptic crossword answer except it’s a number so I guess crossnumber and the clue is “I go smoke weed in. Nice! (7)”
Me when I’m a cryptic crossword answer except it’s a number so I guess crossnumber and the clue is “I go smoke weed in. Nice! (7)”
September 17, 2024 at 9:48 AM
Bluesky now has over 10 million users, and I was #1,606,429!
Me when I’m a cryptic crossword answer except it’s a number so I guess crossnumber and the clue is “I go smoke weed in. Nice! (7)”
Me when I’m a cryptic crossword answer except it’s a number so I guess crossnumber and the clue is “I go smoke weed in. Nice! (7)”
Even better news: for this month only, the Finite Group is even more finite! If you sign up for a paid membership in April, you can get a 50% discount on your first month using the code 3VMFN. You'll get this month's stream, plus the last three months of recordings, AND a crossnumber. Bargain!
April 3, 2026 at 9:04 AM
Even better news: for this month only, the Finite Group is even more finite! If you sign up for a paid membership in April, you can get a 50% discount on your first month using the code 3VMFN. You'll get this month's stream, plus the last three months of recordings, AND a crossnumber. Bargain!
Isn't the answer to the crossnumber just the sum of the digits 0-9? Does that mean I don't need to solve it? @mscroggs.co.uk
May 29, 2026 at 2:22 PM
Isn't the answer to the crossnumber just the sum of the digits 0-9? Does that mean I don't need to solve it? @mscroggs.co.uk
@scroggs I'll tell you what, your latest Crossnumber would have been a lot easier if I hadn't counted the number of answer cells multiple times and got 105 each time.
Went back after several hours and counted the filled ones and suddenly it all fell into place.
I blame my age (and the stroke).
Went back after several hours and counted the filled ones and suddenly it all fell into place.
I blame my age (and the stroke).
March 7, 2026 at 9:11 PM
@scroggs I'll tell you what, your latest Crossnumber would have been a lot easier if I hadn't counted the number of answer cells multiple times and got 105 each time.
Went back after several hours and counted the filled ones and suddenly it all fell into place.
I blame my age (and the stroke).
Went back after several hours and counted the filled ones and suddenly it all fell into place.
I blame my age (and the stroke).
Feed: "Math = Love"
By: Sarah Carter on Friday, May 22, 2026
By: Sarah Carter on Friday, May 22, 2026
Converting Roman to Arabic Numerals Crossnumber Puzzles
Practice converting Roman numerals to Arabic numerals with this free printable crossnumber puzzle.
mathequalslove.net
May 22, 2026 at 7:27 AM
Feed: "Math = Love"
By: Sarah Carter on Friday, May 22, 2026
By: Sarah Carter on Friday, May 22, 2026