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?
How many lambs does Merry's brother take care of? ** Merry's brother takes care of 10 + 3 = <<10+3=13>>13 lambs.
How many lambs do Merry and her brother have? ** So, together Merry and her brother have 10 + 13 = <<10+13=23>>23 lambs.
#### 23