Merry's brother takes care of 10 + 3 = <<10+3=13>>13 lambs.

So, together Merry and her brother have 10 + 13 = <<10+13=23>>23 lambs.

# Answer

23
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Merry is taking care of 10 lambs. Her brother takes care of 3 more lambs than Merry. How many lambs do Merry and her brother have?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
23
Merry is taking care of 10 lambs. Her brother takes care of 3 more lambs than Merry. How many lambs do Merry and her brother have?
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