Given the value:
-21
Let's determine the type of number given.
Natural numbers are numbers from 1 to infinity. It is all positive numbers.
Since -21 is negative, it is NOT a natural number.
Integers are number that has no fractional or decimal parts.
Hence, -21 is an integer.
Irrational numbers can be said to be numbers which cannot be expressed as fractions.
-21 is NOT an irrational number.
A negative number is not a whole number.
Hence, -21 is not a whole number.
Rational numbers are numbers which include intergers, fraction, or decimals.
Hence -21 is a rational number.
Real numbers include all positive and negative numbers.
Hence, -21 is a real number.
Therefore, the following terms are correct:
• Integer
,
• Rational number
,
• Real number.
ANSWER:
• Integer
,
• Rational number
,
• Real number.