There were 10 test cases.  The percentage of assignments that got each
test case right is shown here:

Test  1:  89.1%
Test  2:  96.6%
Test  3:  95.9%
Test  4:  95.9%
Test  5:  95.9%
Test  6:  95.2%
Test  7:  95.9%
Test  8:  95.9%
Test  9:  97.3%
Test 10:  94.6%