Lisa’s Reviews > Thinking, Fast and Slow > Status Update
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This is my second go in this book. I didn't finish last time because the library (it's popular and they only carry one copy for the whole island!?!). And I still don't know how if a ball and bat cost $1.10, where the bat is $1 more than the ball, how scientifically the ball only costs 5¢. And I'm still mad about it. Because math. And I can't find a satisfactory answer on the interwebs... That is all.
— Dec 19, 2020 06:49AM
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I was totally looking for an answer! But this answer makes no sense to me. Because a dollar more doesn't equal $1.05...
If you didn't know what ball costs or you didn't want to reverse-engineer the answer, the formula would look something like1.10 = x + (x + 1)
and you'd have to solve for x.
Or you could just subtract 1 from 1.10 and divide the sum (.10) by 2 (two objects, bat and ball). That's basically doing the same thing as the formula.
I hated algebra in school, and I thought it was a pack of lies.
Put another way, if the ball is 5c and the bat is $1, that's *not* a dollar more; a $1 bat would only be $0.95 more than the 5c ball
See. I like algebra. And the only way that makes sense is when you reversed explained it in the last comment. But I'm still having trouble believing that is correct, even though it's very plainly correct. Lol. Thanks dude! I appreciate the effort!!!


ball $0.05
+bat $1.05
= $1.10
Hope that helps, and if you weren't actually looking for an answer I sincerely apologize 🙊