Fatimah = 8 units, Siti = 11 units. Siti has 3 units more, and that difference is 9 cards.<br><br>[[model:questions/solutions/q5374.png]]<br><br>• Siti − Fatimah → 11 units − 8 units = 3 units → 9<br>• 1 unit → 9 ÷ 3 = 3<br>• Total → 8 + 11 = 19 units = 19 × 3 = 57<br><br>There were 57 cards in the pack.<br>Check: Fatimah 24 + Siti 33 = 57; 33 − 24 = 9. ✓