Ian gave a total of 6 + 9 + 4 = <<6+9+4=19>>19 roses.

Therefore, Ian kept 20 - 19 = <<20-19=1>>1 rose.

# Answer

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<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Ian had twenty roses. He gave six roses to his mother,  nine roses to his grandmother, four roses to his sister, and he kept the rest. How many roses did Ian keep?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
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Ian had twenty roses. He gave six roses to his mother,  nine roses to his grandmother, four roses to his sister, and he kept the rest. How many roses did Ian keep?
train