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Are all square roots of even numbers rational?
No. The square roots 8 are irrational, as are the square roots of most even numbers.
What is the disadvantage of completing a square?
Just working with fractions if the coefficient of x is not an even number, however I would not call it a disadvantage because fractions are beautiful numbers.
Are odd numbers divisible by even numbers?
No. because odd numbers don't have 2 as a factor but even numbers do. So it won't be a whole number.
What is the first 100 even numbers?
The first 100 even numbers are: 2 468101214161820222426283032343638404244464850525456586062646668707274767880828486889092949698100102104106108110112114116118120122124126128130132134136138140142144146148150152154156158160162164166168170172174176178180182184186188190192194196198200.
Are there fewer rational numbers than irrational numbers?
For any given subset, yes, because there are an infinite number of irrational numbers for each rational number. But for the set of ALL real numbers, both are infinite in number, even though the vast majority of real numbers would be irrational.
