0

# Tell whether each number is rational?

Updated: 9/18/2023

Wiki User

13y ago

Rational numbers include integers, and any number you can write as a fraction (with integers in the numerator and denominator). Most numbers that include roots (square roots, cubic roots, etc.) are irrational - if you take the square root of any integer except a perfect square, for example, you'll get an irrational number. Expressions involving pi and e are also usuallyirrational.

Wiki User

13y ago

Earn +20 pts
Q: Tell whether each number is rational?
Submit
Still have questions?
Related questions

### What is 240 and 30 as a rational number?

Each of the two numbers is a rational number.

### Is 0.31 a rational number?

Write each rational number as b. 0.31

### What is the comparison of a rational number and a ratio?

I have no idea what "compersion" means or what you are trying to say. A rational number is so called because it can be expressed as ratio of two integers. Each rational number is a ratio and each ratio is a rational number. However, the relationship is not one of equivalence: each rational number can be represented by infinitely many equivalent ratios.

Not necessarily.

### Is the number -5 a whole number an integer a rational number or a real number?

It is each one of them.

### Is the difference of two rational numbers always rational?

Yes. This is the same as asking for one rational number to be subtracted from another; to do this each rational number is made into an equivalent rational number so that the two rational numbers have the same denominator, and then the numerators are subtracted which gives a rational number which may possibly be simplified.

### Can you add an irrational number and a rational number?

Let `a` be a rational number and `b` be an irrational number,assume that the sum is rational. 1.a +b =c Where a and c are rational and b is irrational. 2.b=c-a Subtracting the same number a from each side. 3.b is irrational c-a is a rational number we arrived at a contradiction. So the sum is an irrational number.

### Is a rational number a ratio of any two integers?

Not quite. A rational number is a ratio and each rational number is a ratio of specific pairs of integers - not ANY two integers. And, of course, 0 is not allowed on the denominator.

### How can you tell whether za number is prime?

A number is prime if it only has two distinct factors.

### Tell whether each number is a prime or composite 173911and 101?

101, 173 and 911 are all prime numbers. 173911 is not.

### What number divides out into 2 and five sevenths?

Each and every rational number except 0. Once you leave the domain of integers, all rational numbers (excluding 0) divide into every other rational number with a quotient that is rational. The above can be extended to real numbers.

### Tell whether each number is prime or composite or neither?

In theory it is possible but in practice, if a number is a product of two very large primes - each being a hundred digits long, or larger - then it is very difficult to tell whether it is prime or composite. The fact that it is so difficult makes this characteristic particularly useful for data encryption.