The addition tests on Education for Life has 45 standard levels. The first 6 of these levels give the user the option to sit a 20 or 40 question test. In the image below is a multiple-choice test. So the user simply has to choose an answer from one that is displayed. The user will be given a set amount of time to get as many correct as possible. The computer will keep score and show you how many you get right or wrong. There is a reset button which the user can press to start the test from the beginning. If the user gets 5 or more wrong the test will end.
There are many different tests that the user can take from a standard sum of adding 2 numbers together or you can take a test and add 3 numbers together.