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Posted by amdx on March 24, 2012, 12:52 am
This guy tries to explain a simple math problem to his wife,
but she has a slightly different understanding.
Posted by Mark F on March 24, 2012, 3:50 pm
Somehow she gets the right answers at several points
58 minutes (for the original question of how long for 80 miles at
miles per hour. (correct is 60; off 3%))
7 minute miles is 10 miles per hour (correct is 8.5; off 20%)
She also says that (automobile) tiles go 400 revolutions per mile
I think a typical circumference is about 8 feet, so 700.
She wasn't so close here, being off more then 40%.
I'm not sure if she is doing the arithmetic and messing up
or if she is estimating from her unstated experience. (Counting
the tire revolutions would be hard, but maybe she read it
At a few points she wants to double something when she should
be halving it. We can't tell if she'd do better with paper and
pencil. It seems like for some reason she thought the problem
was complicated and can't do a reset to get back to the definitions
of things. Either that or she had a stroke and some connections
that used to be there are missing. Giving her the problem
with pencil and paper might get her to reset or to get the
answer trivially using another part of her brain.
Posted by Mark F on March 25, 2012, 4:41 pm
Assuming nothing is broken from a stroke or some such thing, she
probably just needs someone to sit down with her and teach her
dimensional analysis. Then she won't multiply when she should divide,