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JudyIt is a rational number. A rational number is any number that can be written as p/q, where p and q are integers (and q is not equal to zero). Obviously 2 over 3 can be written as 2/3. Furthermore 2 and 3 are both integers. An irrational number is any number that cannot be written as a fraction as described earlier. This means that it has a infinite decimal expansion, with no repeating sequence. But if you would try to calculate 2 over 3, you'd just get 0.66666... where the 6 repeats infinitely many times. As I mentioned an irrational number cannot have a repeating sequence, so 0.66666... cannot be an irrational number, because the 6 repeats.
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Is 21 over the square root of 4 a rational or irrational?
It is equal to 21/2 which is a rational number
Is 5.4 an irrational or rational number?
5.4 = 5 2/5 = 27/5 so it is a rational number.
How do you turn an irrational number in to a rational number?
Some irrational numbers can be multiplied by another irrational number to yield a rational number - for example the square root of 2 is irrational but if you multiply it by itself, you get 2 - which is rational. Irrational roots of numbers can yield rational numbers if they are raised to the appropriate power
Is the square root of a number rational or irrational?
that depends on the number. sqrt(2) is irrational, sqrt(4)=2 is rational
Will any irrational number divided by an irrational number be irrational?
No.3*sqrt(2) and sqrt(2) are irrational. But their quotient is 3, which is rational.
