Is 153 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 153 is composite or not first we have to find its factors.
Contents
Factors of 153:
- If we have taken numbers from 1, 2, 3…for checking factors of 153, we found that 153 has factors 1, 3, 9, 17, 51 and 153. Hence, we must say that 153 is a composite number.
- Thus, 153 is the composite number.
- If we multiply 153 by 1, 2, 3 then we get the multiples of 153 which are 153, 306, and so on.
About the number 153:
- 153 has more than two factors which are 1, 3, 9, 17, 51 and 153 and hence it is the composite number.
- 153 is the odd composite number and it is not the perfect square also.
- If we divide 153 by 1, 3, 9, 17, 51 and 153 then we get remainder as zero. Hence, 1, 3, 9, 17, 51 and 153 are the factors of 153.
Note:
- 153 is not the perfect square.
- Factors of 153: 1, 3, 9, 17, 51 and 153
- Prime factors of 153: 3, 17
Conclusion:
- 153 is the composite number which has factors 1, 3, 9, 17, 51 and 153.
- And hence, 153 is not the prime number.
Multiple Choice Questions:
1) 153 is a
a) odd 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 153 are
a) 1
b) 3, 17
c) Both a and b
d) 1531
Ans: b) 3, 17
3) 1 is the not prime factor of 153 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