The smallest value in a data set is 4 and the range is 11. What is the largest value?

Explication

A range is the largest value minus the smallest, so the largest value equals the smallest value plus the range, giving 4 + 11 = 15. Answering 7 subtracts 4 from 11 instead of adding, and a quick check exposes it, because data running from 4 up to 7 would have a range of only 3.