28 September 2025

• curprev 23:1523:15, 28 September 2025 Persevereplayer talk contribs m 5,373 bytes 0 →Solution 2 (very Intuitive and Fast)
• curprev 23:1423:14, 28 September 2025 Persevereplayer talk contribs m 5,373 bytes +26 glazing the solution

29 August 2025

• curprev 13:3613:36, 29 August 2025 MRENTHUSIASM talk contribs m 5,347 bytes +1 →Problem

11 October 2024

• curprev 20:0120:01, 11 October 2024 Stemivy1 talk contribs 5,346 bytes +101 No edit summary

24 October 2023

• curprev 20:3120:31, 24 October 2023 Tigertan talk contribs 5,245 bytes 0 →Solution 3
• curprev 20:3120:31, 24 October 2023 Tigertan talk contribs 5,245 bytes −1,162 No edit summary

5 January 2022

• curprev 02:4902:49, 5 January 2022 MRENTHUSIASM talk contribs m 6,407 bytes +22 No edit summary

16 October 2021

• curprev 04:1304:13, 16 October 2021 Icematrix talk contribs m 6,385 bytes +12 No edit summary

2 August 2021

• curprev 21:4821:48, 2 August 2021 Qianqian07 talk contribs m 6,373 bytes +2 →Solution 4
• curprev 21:4821:48, 2 August 2021 Qianqian07 talk contribs m 6,371 bytes +2 →Solution 4
• curprev 21:4821:48, 2 August 2021 Qianqian07 talk contribs m 6,369 bytes +2 →Solution 3
• curprev 21:4821:48, 2 August 2021 Qianqian07 talk contribs m 6,367 bytes +2 →Solution 1

1 February 2021

• curprev 23:0423:04, 1 February 2021 Hansenhe talk contribs 6,365 bytes +255 No edit summary
• curprev 22:5022:50, 1 February 2021 Hansenhe talk contribs 6,110 bytes +1,563 Add new solution

30 December 2020

• curprev 16:4716:47, 30 December 2020 Krisha12 talk contribs 4,547 bytes +105 No edit summary
• curprev 16:3916:39, 30 December 2020 Krisha12 talk contribs 4,442 bytes −2 No edit summary
• curprev 16:3916:39, 30 December 2020 Krisha12 talk contribs 4,444 bytes +1 No edit summary
• curprev 16:3816:38, 30 December 2020 Krisha12 talk contribs 4,443 bytes −28 No edit summary

1 February 2020

• curprev 18:1018:10, 1 February 2020 Anmol04 talk contribs m 4,471 bytes +20 changed headers

28 January 2020

• curprev 13:1713:17, 28 January 2020 Angelalz talk contribs m 4,451 bytes +76 →Solution 1
• curprev 13:1413:14, 28 January 2020 Angelalz talk contribs m 4,375 bytes +11 →Solution 1

26 January 2020

• curprev 16:0116:01, 26 January 2020 Mathpluspianoequalslife talk contribs 4,364 bytes −24 No edit summary
• curprev 01:4101:41, 26 January 2020 Icematrix talk contribs m 4,388 bytes +61 No edit summary

3 January 2020

• curprev 01:0401:04, 3 January 2020 Shurong.ge talk contribs m 4,327 bytes −13 No edit summary

5 December 2019

• curprev 00:3600:36, 5 December 2019 Anmol04 talk contribs m 4,340 bytes +13 added "Problem" to the top

4 February 2019

• curprev 22:2722:27, 4 February 2019 Dpwong2 talk contribs m 4,327 bytes +1 →See Also: Fixed formatting (pre-edit said on AMC 12 w/o A signifier)

27 January 2019

• curprev 22:2622:26, 27 January 2019 Humanity789 talk contribs m 4,326 bytes −17 →Solution 1

25 January 2019

• curprev 04:1004:10, 25 January 2019 Olutosinfires talk contribs 4,343 bytes +1 →Solution 3
• curprev 04:0604:06, 25 January 2019 Olutosinfires talk contribs 4,342 bytes +1,186 →Solution 2: and →Solution 3

20 January 2019

• curprev 18:4018:40, 20 January 2019 Bhhaops talk contribs 3,156 bytes −1 →See Also

4 December 2018

• curprev 09:4209:42, 4 December 2018 Abrax3141 talk contribs m 3,157 bytes +114 →Solution 1: -- Noted confusing labelling of diagram

27 November 2018

• curprev 21:0721:07, 27 November 2018 Brendanb4321 talk contribs m 3,043 bytes −14 →Solution 2

7 July 2018

• curprev 12:4412:44, 7 July 2018 Chickenry talk contribs m 3,057 bytes +69 →Solution 1

18 June 2018

• curprev 15:3915:39, 18 June 2018 Rockmanex3 talk contribs 2,988 bytes +50 →See Also

26 March 2018

• curprev 19:4619:46, 26 March 2018 Eatingstuff talk contribs m 2,938 bytes +14 →Solution 2

22 February 2018

• curprev 08:3108:31, 22 February 2018 Coolmath34 talk contribs 2,924 bytes −12 →Solution 1

19 February 2018

• curprev 15:0315:03, 19 February 2018 Squareman talk contribs m 2,936 bytes +2 →Solution

16 February 2018

• curprev 22:1122:11, 16 February 2018 Brendanb4321 talk contribs 2,934 bytes +662 Added Solution 2

11 February 2018

• curprev 13:0213:02, 11 February 2018 Anna0kear talk contribs m 2,272 bytes +2 No edit summary
• curprev 12:5812:58, 11 February 2018 Anna0kear talk contribs 2,270 bytes +2 to add solution
• curprev 12:5712:57, 11 February 2018 Anna0kear talk contribs 2,268 bytes +691 to add solution
• curprev 12:5612:56, 11 February 2018 Anna0kear talk contribs 1,577 bytes −17 No edit summary

10 February 2018

• curprev 20:2820:28, 10 February 2018 Rachanamadhu talk contribs 1,594 bytes +15 No edit summary

8 February 2018

• curprev 21:0921:09, 8 February 2018 Kevinb9n talk contribs 1,579 bytes +53 →Solution
• curprev 18:4618:46, 8 February 2018 Pi3141592 talk contribs 1,526 bytes +72 →Solution
• curprev 17:3417:34, 8 February 2018 Benq talk contribs 1,454 bytes +47 No edit summary
• curprev 17:0917:09, 8 February 2018 A1b2 talk contribs m 1,407 bytes +2 No edit summary
• curprev 15:4415:44, 8 February 2018 Nosysnow talk contribs 1,405 bytes +649 Added solution -- please add a more rigorous one!
• curprev 13:0613:06, 8 February 2018 Ishankhare talk contribs 756 bytes +756 Created page with "A scanning code consists of a <math>7 \times 7</math> grid of squares, with some of its squares colored black and the rest colored white. There must be at least one square of..."