human
Owen bred 21 turtles, and Johanna has 5 fewer turtles than Owen. After 1 month, Owen has twice as many turtles as before and Johanna loses half of her turtles and donates the rest to Owen. How many turtles did Owen have?
assistant
How many turtles did Johanna have? ** Johanna had 21 turtles - 5 turtles = <<21-5=16>>16 turtles.
How many turtles did Owen have after 1 month? ** After 1 month, Owen was left with 21 turtles * 2 = <<21*2=42>>42 turtles.
How many turtles did Johanna have after 1 month? ** After 1 month, Johanna was left with 16 turtles / 2 = <<16/2=8>>8 turtles.
How many turtles did Owen have after Johanna's donation? ** After Johanna's donation, Owen was left with 42 turtles + 8 turtles = <<42+8=50>>50 turtles.
#### 50