5 is a rational number and it is also a Prime number
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√ 5 is an irrational number. Any square root of a prime number is irrational.
Yes -10 is a rational number
The definition of a rational number is any number that can be written as a fractionwith integers (whole numbers) in both the numerator and denominator. Any numberthat can't be written that way is irrational.Here on WikiAnswers, we see many questions that ask "Is the number (xxxxxx) rational ?"The answer to those questions is always 'yes', because the number is in thequestion, and any number that you can completely write down with digits is arational number.
5 is prime.
If the number ends in 5 or 0 the whole number is divisible by 5.