12th board exam date 2024 rbse time table July 8, 2019 16 32 64 128 12th board exam date 2024 rbse time table arts 12th board exam date 2024 rbse time table science 12th class board exam date 2024 rbse time table Board exam 2023 Board exam 20023 2023 12th board exam date 12 школа тирасполь