Is 154 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 154 is composite or not first we have to find its factors.
Contents
Factors of 154:
- If we have taken numbers from 1, 2, 3…for checking factors of 154, we found that 154 has factors 1, 2, 7, 11, 14, 22, 77 and 154. Hence, we must say that 154 is a composite number.
- Thus, 154 is the composite number.
- If we multiply 154 by 1, 2, 3 then we get the multiples of 154 which are 154, 308, and so on.
About the number 154:
- 154 has more than two factors which are 1, 2, 7, 11, 14, 22, 77 and 154 and hence it is the composite number.
- 154 is the even composite number and it is not the perfect square also.
- If we divide 154 by 1, 2, 7, 11, 14, 22, 77 and 154 then we get remainder as zero. Hence, 1, 2, 7, 11, 14, 22, 77 and 154 are the factors of 154.
Note:
- 154 is not the perfect square.
- Factors of 154: 1, 2, 7, 11, 14, 22, 77 and 154
- Prime factors of 154: 2, 7, 11
Conclusion:
- 154 is the composite number which has factors 1, 2, 7, 11, 14, 22, 77 and 154.
- And hence, 154 is not the prime number.
Multiple Choice Questions:
1) 154 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 154 are
a) 1
b) 2, 7, 11
c) Both a and b
d) 1541
Ans: b) 2,7, 11
3) 1 is the not prime factor of 154 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