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Previous Tests

The following selection of tests are our previous contests. You may try these tests as many times as you like. At the end of the test, your results will be shown.

For video solutions to some questions, click here.

Start a Previous Test - English
Contest *
Start a Previous Test - Français
Contest *
Start a Previous Test - فارسی
Contest *

There have been 917,454 previous tests taken since September 3rd, 2009.