Is 158 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 158 is composite or not first we have to find its factors.
Contents
Factors of 158:
- If we have taken numbers from 1, 2, 3…for checking factors of 158, we found that 158 has factors 1, 2, 79 and 158. Hence, we must say that 158 is a composite number.
- Thus, 158 is the composite number.
- If we multiply 158 by 1, 2, 3 then we get the multiples of 158 which are 158, 316, and so on.
About the number 158:
- 158 has more than two factors which are 1, 2, 79 and 158 and hence it is the composite number.
- 158 is the even composite number and it is not the perfect square also.
- If we divide 158 by 1, 2, 79 and 158 then we get remainder as zero. Hence, 1, 2, 79 and 158 are the factors of 158.
Note:
- 158 is not the perfect square.
- Factors of 158: 1, 2, 79 and 158
- Prime factors of 158: 2, 79
Conclusion:
- 158 is the composite number which has factors 1, 2, 79 and 158.
- And hence, 158 is not the prime number.
Multiple Choice Questions:
1) 158 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 158 are
a) 1
b) 2, 79
c) Both a and b
d) 1581
Ans: b) 2,79
3) 1 is the not prime factor of 158 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