The two numbers add up to twice the average. The larger is one unit plus 4; the smaller is one unit.<br><br>[[model:questions/solutions/q4669.png]]<br><br>• Total → 2 × 15 = 30<br>• 2 units + 4 → 30<br>• 2 units → 30 − 4 = 26<br>• 1 unit (smaller) → 26 ÷ 2 = 13<br>• Larger → 13 + 4 = 17<br><br>The larger number is 17 and the smaller number is 13.<br>Check: (17 + 13) ÷ 2 = 15 and 17 − 13 = 4. ✓