Question

Indicate whether each number is a prime or a composite number. a. 5 b. 11 c. 18 d. 47 e. 44 f. 65

Answer 1

Answer:

a. Prime

b. Prime

c. Composite

d. Prime

e. Composite

f. Composite

Answer 2

1. (a) Prime
2. (b) Prime
3. (c) Composite
4. (d) Prime
5. (e) Composite
6. (f) Composite

Prime numbers:

• Any natural number higher than 1 that is not the sum of two smaller natural numbers is referred to be a prime number.
• A composite number is a natural number greater than one that is not prime.
• For instance, the number 5 is prime because there are only two ways to write it as a product, 1 × 5 and 5 × 1.

Composite numbers:

• Any positive integer that may be created by multiplying two other positive integers is referred to as a composite number.
• It is, in other words, a positive integer that has at least one divisor besides itself and the number 1.
• Every positive integer is either composite, prime, or the number 1, hence the numbers that are neither prime nor a unit are known as composite numbers.
• For instance, the composite number 14 is created by multiplying the two smaller numbers 2 and 7.
• The numerals 2 and 3 cannot be divided by anything other than themselves and one, hence they are not composite numbers either.

Therefore, the prime and composite numbers are as follows:

1. (a) Prime
2. (b) Prime
3. (c) Composite
4. (d) Prime
5. (e) Composite
6. (f) Composite

Know more about the prime numbers here:

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