A Google-a-Day Puzzle for May 2

Geek Culture

Our good friends at Google run a daily puzzle challenge and asked us to help get them out to the geeky masses. Each day’s puzzle will task your googling skills a little more, leading you to Google mastery. Each morning at 12:01 a.m. Eastern time you’ll see a new puzzle, and the previous day’s answer (in invisitext) posted here.

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We leave the comments on so people can work together to find the answer. As such, if you want to figure it out all by yourself, DON’T READ THE COMMENTS!

Also, with the knowledge that because others may publish their answers before you do, if you want to be able to search for information without accidentally seeing the answer somewhere, you can use the Google-a-Day site’s search tool, which will automatically filter out published answers, to give you a spoiler-free experience.

And now, without further ado, we give you…


The theory that explains a train whistle’s changing pitch as the train passes by was first tested using a group of musicians. What instruments did they play?

YESTERDAY’S ANSWER (mouseover to see):

Search [first class letter rate] to find that it is $0.45 in 2012. Searching for [first class letter rate 1917], you’ll learn that the stamp cost $0.03 in 1917. Subtract [0.45 – .03] to find that you’ll spend 42 cents more to send the letter today.

Homepage photo: ELEOTH/Flickr

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