Rambutan = 7 units, mangosteen = 5 units. Rambutan has 60 more, the 2-unit difference.<br><br>[[model:questions/solutions/q4499.png]]<br><br>• Rambutan − mangosteen → 7 units − 5 units = 2 units → 60<br>• 1 unit → 60 ÷ 2 = 30<br>• Rambutan → 7 units = 7 × 30 = 210<br><br>There are 210 rambutan trees.<br>Check: mangosteen 150, rambutan 210; 210 − 150 = 60. ✓