Yes, 21 is a natural number. Natural numbers are the set of positive integers starting from 1, and they include all whole numbers like 1, 2, 3, and so on. Since 21 is a positive integer, it qualifies as a natural number.
No, the square root of 21 is not a natural number. Natural numbers are positive integers (1, 2, 3, ...), and the square root of 21 is approximately 4.58, which is not an integer. Therefore, it does not qualify as a natural number.
No, 21 is not a prime number. A prime number is defined as a natural number greater than 1 that has no positive divisors other than 1 and itself. Since 21 can be divided evenly by 1, 3, 7, and 21, it has divisors other than 1 and itself, making it a composite number.
Yes. The square root of a natural number (positive integer) is either an integer, or an irrational number.
The only composite factor of 21 is 21.
-8 × (number + 21) = 96 → number + 21 = 96 ÷ -8 → number = 96 ÷ -8 - 21 = -12 - 21 = -33
No, the square root of 21 is not a natural number. Natural numbers are positive integers (1, 2, 3, ...), and the square root of 21 is approximately 4.58, which is not an integer. Therefore, it does not qualify as a natural number.
21
21
If it needs to be natural it is one.
It is a negative whole number which is the same as an integer
No, 21 is not a prime number. A prime number is defined as a natural number greater than 1 that has no positive divisors other than 1 and itself. Since 21 can be divided evenly by 1, 3, 7, and 21, it has divisors other than 1 and itself, making it a composite number.
For any natural number k, 21k is a multiple of k.So for example, if k=1, 21 is the first multiple.Now if k=2, we have 42 which is the next one.In fact for any number n, and any natural number k, kn is a multiple of n.
Yes. The square root of a natural number (positive integer) is either an integer, or an irrational number.
The Natural Kingdom - 2003 21-Jan 1-21 was released on: USA: June 2003
The only composite factor of 21 is 21.
-8 × (number + 21) = 96 → number + 21 = 96 ÷ -8 → number = 96 ÷ -8 - 21 = -12 - 21 = -33
no..a natural number is a whole number