Here’s an online game that helps a very worthy cause.

Test your general knowledge and do a good deed at the same time. For each correct answer, 10 grains of rice are donated to hungry people around the globe through the United Nations World Food Programme.

The opening game is vocabulary, but other categories include math, chemistry, geography, and foreign languages, including French and Spanish.

It’s easy to play: just the click the correct answer from one of four possible choices. If you answer correctly, the next question is a little harder.

Warning: This game may make you smarter.