Is 4 is a composite number or not ?
- As we already know that, the number having factors 1 and the number itself is the prime number.
- And numbers having more than these two factors are the composite numbers.
- To check whether the number 4 is composite or not first we have to find its factors.
Contents
Factors of 4:
- If we have taken numbers from 1, 2, 3…for checking factors of 4, we found that 4 has factors 1, 2 and 4. Hence, we must say that 4 is a composite number.
- Thus, 4 is the composite number.
- If we multiply 4 by 1, 2, 3, then we get the multiples of 4 which are 4, 8, 12…and so on.
About the number 4:
- 4 has more than two factors which are 1, 2 and 4 and hence it is the composite number.
- 4 is the even composite number and it is the perfect square also.
- If we divide 4 by 1, 2 and 4 then we get remainder as zero. Hence, 1, 2 and 4 are the factors of 4.
Note:
- 4 is the perfect square.
- Factors of 4: 1, 2, 4
- Prime factors of 4: 4 has prime factor as 2.
Conclusion:
- 4 is the composite number which has factors 1, 2 and 4.
- And hence, 4 is not the prime number.
Multiple Choice Questions:
1) 4 is a
a) even number
b) Prime number
c) Composite number
d) Both a and c
Ans: d) both a and c
2) The prime factors of a composite number 4 are
a) 1
b) 2
c) Both a and b
d) 121
Ans: b) 2
3) 1 is the not prime factor of 4 because
a) It is the prime number
b) 1 is neither prime nor composite number
c) Both a and b
d) Given statement is false
Ans: b) 1 is neither prime nor composite number