Question

What kind of number is 70?

Answer 1

Hint: We must start from the top, and check whether the given number is real or imaginary. Then we can continue checking the number for being a rational number, integer, whole number and natural number. We must also check whether it is even or odd and whether it is a prime or composite number.

Complete step by step solution:
We know that any number that can be plotted on the number line, is called a real number. We can plot the number 70 very easily on the number line. Thus, 70 is a real number.
We are also aware that any number that can be expressed in the form $\dfrac{p}{q}$, where p and q are integers having no common factor other than 1 and $q\ne 0$, is called a rational number. Here, we can see that the number can be expressed as $\dfrac{70}{1}$, where 70 and 1 are integers with no common factor other than 1, and $1\ne 0$. Thus, 70 is a rational number.
We are very well aware that any number that can be written without a fractional component, fraction or decimal, is called an integer. We can see that the number 70 has no fractional component, and so 70 is an integer.
We know that all basic counting numbers, greater than or equal to 0, are known as whole numbers. Hence, 70 is also a whole number.
All positive numbers, used for counting, are called natural numbers. Thus, we can easily say that, 70 is a natural number.
Also, we can see that 70 is divisible by 2. Hence, it is an even number.
And, we know that all even numbers are composite numbers. Thus, 70 is a composite number.
Thus, we can say that 70 is an even composite number, a real number, a rational number, an integer, a whole number and a natural number.

Note: We know that real numbers are a combination of rational and irrational numbers. We also know that all natural numbers are whole numbers, integers, rational numbers and real numbers as well. Thus, it is sufficient to say that 70 is an even, natural number.