- Here's a simple arithmetic question: "A bat and ball cost $1.10. The bat costs $1 more than the ball. How much does the ball cost?"... more than 50% of students at Harvard, Princeton and the Massachusetts Institute of Technology (who answer the question) routinely give the incorrect answer. http://online.wsj.com/article/SB10001424052970203633104576625071820638808.html 31 comments reddit.com
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