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HKIMO 2026 Grade 5 National Preliminary Set 03 Question 20

HKIMO · HKIMO 2026 Grade 5 National Preliminary Set 03

Question 20

Linda puts two differently colored square sheets next to each other to form a rectangle. After putting the yellow sheet on the red sheet, the rectangle’s area decreases by 12 cm² and its perimeter decreases by 4 cm. Find the original rectangle’s area in cm².

Question illustration
  1. 72
  2. 18
  3. 48
  4. 36