A fantastic download. Choose almost any primary or middle school maths topic and the program will generate 10 random quick questions. With answers.
Web site:
http://www.csfsoftware.co.uk/TQQs/Screenshot.htm
Direct download:
http://www.csfsoftware.co.uk/TQQs/TenQQ.zip

There is also a more sophisticated NagWare version. If you like 10QQ, you will like 10QQ Pro even more:
Web site:
http://www.csfsoftware.co.uk/TQQs_info.htm
Free trial:
http://www.csfsoftware.co.uk/TQQsPRO/TenQQpro.zip