Answer: 49 Explanation: First find all the numbers from 45 to 70 that add to 13, (49, 58, 67) After, square root the result that is a whole number is your answer. But now that I think about it, how the question is being said means that it could be any of the numbers that add up to 13 from 45 to 70 because every number can be squared, just that not every answer is going to give you a whole number