An exercise in rapid mental addition requiring the user to sum the numeric information on 4 cards. The cards contain either a number (1 to 4) or a small set of symbols. The cards are presented for a variable period of time. The task is to add the numbers or number of items on the 4 cards and respond with a mouse click on the correct number.
Current Version: 4.0
Last modified: 21 September 2002
QwikSum from StrongARM Systems