Diane bought 15 + 20 = <<15+20=35>>35 apples.

Therefore, they bought 15 + 35 = <<15+35=50>>50 apples altogether.

# Answer

50
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Diane bought twenty more apples than Cecile. If Cecile bought 15 apples, how many apples did they buy altogether?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
50
Diane bought twenty more apples than Cecile. If Cecile bought 15 apples, how many apples did they buy altogether?
train