Puzzles
A farmer had 15 sheep, and all but 8 died. How many are left?
A farmer had 15 sheep, and all but 8 died. How many sheep does the farmer have left?
Reveal the answer
8. The wording is designed to trigger a reflexive subtraction (15 minus 8 equals 7), but 'all but 8 died' simply means 8 survived. It's one of four items added to the Cognitive Reflection Test in a 2014 update, designed to catch snap, unreflective answers rather than reward memorized responses to the original three-question test.