The following katakana characters are in random order. Please write the Rōmaji (transliteration) in each yellow box.
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This could be useful for English speaking travelers in Japan. There are many English words in Japanese, and they are usually written in Katakana. So by learning these 46 symbols you can read a large number of words on signs. My friend used this skill, for example, to follow a sign to a ferry.
Yes katakana are very useful for borrowed foreign words. If you are looking for something native to Japanese, it's also useful to know the hiragana e.g. when looking for sushi :) Maybe a hiragana quiz too?