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13 Comments:
I need a car with seats like that! The only other thing it needs is a plexi-glass barrier and a loud stereo, and I'm set for a road trip with the kids.
Damn that mathproblem. I took me a couple of minutes of counting before I solved it. But it gave me a great feeling of satisfaction after solving it! It is worth it!
The trick is not to over think the math problem, but when i noticed a pattern, it all made sense.
At first sight this math can't be resolved without computer but actually it is really good exercise for mental calculating!
For the problem painted by N. P. Bogdanov-Belsky:
If we know that:
•10^2 = 100
•11^2 = 121
•12^2 = 144
•100 + 121 + 144 = 365
•10^2+11^2+12^2 = 13^2+14^2
then it comes :
10^2 +11^2 +12^2 + 13^2 +14^2
= 365 + 365
so:
(10^2 +11^2 +12^2 + 13^2 +14^2)/365
= (365+365) / 365
= (1+1) / 1
= 2
it can be done in mental arithmetic
Buddy of mine had a early 2000's Ford Torus station wagon and it had rumble seats in it. Very popular on road trips I might add!
Here's an even earlier GPS-like device, from 1932:
http://www.flickr.com/photos/nationaalarchief/4192749543/in/set-72157623018193396/
The whole set is very interesting, btw
The answer is 2.
It's really easy. :]
The cat at the end jumps because the balloon pops, the 'water' you're seeing is just the string/ribbon attached to the balloon.
Cats are capable of anti-gravity and bending space-time ... this capability goes away when they get older.
Rear-facing seats in the back of station wagons were a regular, even expected feature. The back flips down, leaving a flat floor for load hauling. You had to install the plexiglass barrier yourself...
Regards,
Ric
Question about the math problem:
Why does 10^2+11^2+12^2 = 13^2+14^2 ?
Of course it is true, but I am not familiar with the principle.
There is no any principle here. It's just a weird math fact, which allowed to create such a tricky exercise.
For mental calculation we don't need to calculate full sum of numerator knowing that the part of it is equal to denominator. We just put in mind that the first summand is 1. And when we calculate the second component of the numerator it is easy to see the final result.
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