Yanna bought 60 apples. She gave eighteen apples to Zenny. She gave six more apples to Andrea and kept the rest. How many apples did she keep?
After giving 18 apples to Zenny, Yanna remained with 60 - 18 = <<60-18=42>>42 apples.
Since she also gave Andrea 6 apples, Yanna remained with 42 - 6 = <<36=36>>36 apples
Therefore, Yanna kept 36 apples.
#### 36