This problem seems like it is solvable, but it is actually an impossible problem. Can you figure out what is wrong with the question?
SEAB release on error in 2005 PSLE Q13
https://www.seab.gov.sg/content/pressReleases/SEAB_Press_Release_(11Oct2005)PSLE_Maths.pdf
wikinews
https://en.wikinews.org/wiki/Singapore_Exam_Board_sets_mathematically_impossible_question
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