Friday, September 23, 2011

Hmm again ...

... Belief in God Boils Down to a Gut Feeling - Yahoo! News.

... the participants took a three-question math test with questions such as, "A bat and a ball cost $1.10 in total. The bat costs $1 more than the ball. How much does the ball cost?"

The intuitive answer to that question is 10 cents, since most people's first impulse is to knock $1 off the total. But people who use "reflective" reasoning to question their first impulse are more likely to get the correct answer: 5 cents.

My mathematical ineptness is legendary, but I've always been pretty good at arithmetic. So what am I missing here? What accounts for the remaining 5 cents? Also, it may well be that there is no one-size-fits-all way to arrive at truth.



5 comments:

  1. The ball costs 5 cents. The bat costs one dollar more than that---so, $1.05. Add 'em together, and you get $1.10.

    ReplyDelete
  2. If you're a dullard like some of us and not good at guessing or at just seeing the answer, a little algebra helps:

    x is the cost of the ball
    (1.00 + x) is the cost of the bat

    (1.00 + x) + x = 1.10
    1.00 + 2x = 1.10
    1.00 + 2x - 1.00 = 1.10 - 1.00
    2x = .10
    2x/2 = .10/2
    x = .05

    1.00 + x = 1.00 + .05 = 1.05

    1.05 + .05 = 1.10

    ReplyDelete
  3. They were purchased in New Hampshire, which has no sales tax.

    ReplyDelete
  4. Anonymous8:32 AM

    Nike Free Run 2 new style running shoes,
    Nike Free Run womens running shoes,
    Nike Free Run Plus good shoes for running,
    Nike lunarglide 2 running shoes,
    Nike free run 3.0 for mens,
    Nike free 3.0 womens shoes,
    Nike Free cheap cheap running shoes for sale.

    Nike Free Run Sale online store,
    Nike Free Run womens running shoes,
    Nike Free Run Plus running shoes
    Nike lunarglide 2 running shoes
    Nike free 3.0 sale
    Nike free 3.0 womens


    Nike Free Run Cheap shoes for sale,
    Nike Free Run womens running shoes,
    Nike Free Run Plus running shoes
    Nike lunarglide 2 running shoes
    Nike free 3.0 sale
    Nike free 3.0 womens
    Cheap Nike Free Run shoes for sale.

    ReplyDelete