Yes. The equation for the beginning of the universes from the Big Bang has not been entirely resolved. theories have been advance by Hawking and others, but not everyone agrees with the theories. They will believe only when the mathematical proof is discovered.
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The math problem 4.6 x 0.7 can be solved by multiplying. The answer to this problem would be 3.22. This math problem can easily be solved by elementary students and higher.
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pi has yet to be solved so i guess that pi is a impossible math problem.That above meaning the digits of pi. Pi is an irrational number so its digits will go forever. Not sure if that's considered a math problem, though.How about trisecting an angle using geometric constructions. That one hasn't been solved yet to my knowledge.Squaring the circle - constructing a square and a circle which have the same area, would be another one that I believe is unsolvable.
There is no "hardest" problem. Something that you might find hard might appear easy to someone else and conversely. Also, some of the harder problems do not have solutions yet - if they had been solved then they could not have been so hard!
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