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increment the value on the right by the value on the left( so i += j means increment j by i). :)
This website seems pretty snobby condsidering the questions asked, how they are explained, and how people talk to each other in the discussions. I did a code camp and know some fairly tricky things and most of these questions seem designed for those who either have math degrees or those who already know a lot about Java and want to keep their skills sharp. "Easy"? Sure... How would a Java beginner even know there is a Math.pow method to import?
Anyway, check out codingbat.com for more straightforward questions that actually range from beginners to advanced. Also look into codecademy.com. Really great resources for FREE.