How many live sheep were left if a farmer had 17 sheep, all but 8

Question

how many live sheep were left if a farmer had 17 sheep, all but 8 died?this question is part of pre employment IQ test

chewkale@hotmail.com · Accepted Answer

17 sheep. All died. But 8 survived. Shouldn't it be 8 live sheep?

John Adney · Answer

All but 8 died. So 8 lived. This is the oldest trick question in the book, and the author of this quiz managed to input the correct answer.

How many live sheep were left if a farmer had 17 sheep, all but 8 died?