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Likewise, is 3 an irrational number?

For example, 3 = 3/1 and therefore 3 is a rational number. It is a number that cannot be written as a ratio of two integers (or cannot be expressed as a fraction). For example, the square root of 2 is an irrational number because it cannot be written as a ratio of two integers.

Also, is 0 an irrational number? Any number which doesn't fulfill the above conditions is irrational. What about zero? It can be represented as a ratio of two integers as well as ratio of itself and an irrational number such that zero is not dividend in any case. People say that 0 is rational because it is an integer.

Keeping this in consideration, is Square Root 3 rational?

The square root of 3 is the positive real number that, when multiplied by itself, gives the number 3. It is more precisely called the principal square root of 3, to distinguish it from the negative number with the same property. It is denoted by √3. The square root of 3 is an irrational number.

Is 4 an irrational number?

Integers that are perfect squares can have their square root cleanly taken. √4 = 2 because 2^2 = 4. 2 is an integer and thus a rational number. Thus, we conclude that √4, being the same as 2, is also rational.