What is the maximum number of 3 *3 squares that can be formed from the squares in the 6* 6 checker board to the right?

PSC Bangladesh Navy — Upper Division Assistant BCS 20th BCS Preli - 1998 21st BCS Preli - 1999 BJS 5th BJS Preli - 2010 DPE Primary Head Teacher - 2012 Primary Head Teacher - 2008 NTRCA 13th NTRCA College - 2016 Primary Teacher Pre-Primary Teacher - 2013 Pre-Primary Teacher - 2014 ATEO ATEO - 2017 DG Food FI/SI Food - 2011 CAG Auditor - 2011 Agrani Bank Agrani Senior Officer - 2015 12th NTRCA - 2015 DIP Assistant Director - 2003 DSS House Parent cum Teacher - 2018 IFIC IFIC Asst. Officer - 2018 DCAO – Assistant Director - 2019 16th NTRCA College - 2019 BPO – Postal Operator - 2019 CGDF – Auditor - 2019 CAAB – Various Posts - 2021 DSHE – Computer Typist - 2023 18th NTRCA - 2024 Bangladesh Railway – ALM (Grade-2) - 2024 DYD Office Assistant - 2026 Bangladesh Navy — Upper Division Assistant - 2026 গণিত বর্গক্ষেত্রের ক্ষেত্রফল

PSC BAEC — Laboratory Attendant MoLJPA Assistant Secretary (Drafting) - 2001 BR Booking Assistant - 2016 BPSC Assistant Director - 2006 BMD Assistant Meteorologist - 2007 Primary Teacher Primary Assistant Teacher - 2019 DGFI Security Inspector (SI) - 2025 BAEC — Laboratory Attendant - 2026 গণিত বর্গক্ষেত্রের ক্ষেত্রফল

PSC MPA Security Guard DGFP Office Assistant - 2011 MoFA Administrative Officer - 2004 BREB – Assistant Enforcement Coordinator - 2019 PMO – Watcher Constable - 2019 BR ASM - 2022 DESCO – AE - 2023 TGTDCL – Technician/Sales Assistant - 2023 KB Karmasangsthan Officer - 2023 BUET DPDC – Complain Supervisor - 2025 MPA Security Guard - 2026 গণিত বর্গক্ষেত্রের ক্ষেত্রফল

PSC BPSC MoWR Assistant Director (Admin) গণিত বর্গক্ষেত্রের ক্ষেত্রফল

PSC DYD Office Assistant BCS 20th BCS Preli - 1998 21st BCS Preli - 1999 BJS 5th BJS Preli - 2010 DPE Primary Head Teacher - 2012 Primary Head Teacher - 2008 NTRCA 13th NTRCA College - 2016 Primary Teacher Pre-Primary Teacher - 2013 Pre-Primary Teacher - 2014 ATEO ATEO - 2017 DG Food FI/SI Food - 2011 CAG Auditor - 2011 Agrani Bank Agrani Senior Officer - 2015 12th NTRCA - 2015 DIP Assistant Director - 2003 DSS House Parent cum Teacher - 2018 IFIC IFIC Asst. Officer - 2018 DCAO – Assistant Director - 2019 16th NTRCA College - 2019 BPO – Postal Operator - 2019 CGDF – Auditor - 2019 CAAB – Various Posts - 2021 DSHE – Computer Typist - 2023 18th NTRCA - 2024 Bangladesh Railway – ALM (Grade-2) - 2024 DYD Office Assistant - 2026 Bangladesh Navy — Upper Division Assistant - 2026 গণিত বর্গক্ষেত্রের ক্ষেত্রফল

PSC PMG Northern Circle Rajshahi Postal Operator BCS 32nd BCS Preli - 2012 RAKUB RAKUB Officer (Cash) - 2015 BR SAE (Bridge) - 2018 DNC – Sub-Inspector - 2019 MOFA – Personal Officer - 2019 BBS – Thana Statistician - 2020 CAAB – Assistant Security Officer - 2021 Primary Teacher Primary Teacher (Phase 1) - 2022 Biman – Ground Service Assistant - 2022 DYD AUYDO - 2022 DYD Cashier - 2022 DSHE Accounts Assistant - 2023 BPO – Postal Operator - 2023 BUET CPGCBL – Sub-Assistant Engineer - 2023 Combined Bank Combined Bank Senior Officer - 2023 EGCB – Assistant Engineer - 2024 DLS – Office Assistant Cum-Computer Typist - 2025 NBR – Data Entry / Control Operator - 2025 PMG Northern Circle Rajshahi Postal Operator - 2026 গণিত বর্গক্ষেত্রের ক্ষেত্রফল