Of 88 people, 53 like tea, 43 like coffee, 14 like both. How many like neither?

At least one = A + B − both (subtract the overlap once); neither = total − that. The correct answer is 6. Traps to avoid: 35 comes from the "removed one set" error; 45 comes from the "removed one set" error; 14 comes from the "gave overlap" error; 82 comes from the "gave at least one" error.