20: The middle digit [**]
Wes Carroll's Puzzler
English - August 28, 2016 04:00 - 2 minutes - 1.36 MB - ★★★★★ - 2 ratingsLeisure Education Courses math puzzles puzzle puzzler amc riddles problem-solving math contest math competition Homepage Download Apple Podcasts Google Podcasts Overcast Castro Pocket Casts RSS feed
Previous Episode: 19: The token tax [**]
Next Episode: 21: The faulty odometer [***]
How many three-digit numbers satisfy the property that the middle digit is the average of the first and the last digits?
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Spiciness: ** out of ****