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?
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.
#### 23