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Free Rice is the “granddaddy” of these games. If you choose the correct definition of the word, the next word you’re given is “harder.” If you answer incorrectly, the next word is supposed to be “easier.” In addition, for every word you get correct, ten grains of rice are donated to an international aid agency. A year-and-a-half ago, the BBC published a story quoting United Nations’ officials as saying the game has generated enough funds to feed 50,000 for a day at that time. Free Rice recently expanding its game and now has questions related to grammar, geography, art, foreign language and math, too.
Free Flour asks geography questions and says they donate a spoon of flour for every correct answer.
Answer 4 Earth is another game that donates funds to plant trees based on the number of correct answers. The questions cover a very wide-range of subjects. Answer 4 Earth appears to do a good job of substantiating their donation claims.
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