One little zero. That's all it took to get readers of the Saturday TIMES NEWS to start cranking out emails wondering why they couldn't come up with the correct answer to the question that appeared in Bob Urban's Back Again column.

The question concerned math, and here's how it was worded."Third question: This must be done in your head only. Do not use paper and pencil or a calculator."Take 1000 and add 40 to it. Now add another 1000 and add 30. Add another 100. Now add 20. Now add another 1000. Now add 10. What is the total?"ANSWER: Did you get 5000? Sorry, that's wrong. The correct answer is 4100. If you don't believe it, check it out with a calculator."All the readers who tried answering the question came up with the answer 3200, not 4100. Here's why. Where it says "add another 100" it should have read "add another thousand". Try it again using the extra zero and you'll come up with the correct answer.Sorry for all the confusion that the dropped zero caused.