Is 169 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 169 is composite or not first we have to find its factors.
Contents
Factors of 169:
- If we have taken numbers from 1, 2, 3…for checking factors of 169, we found that 169 has factors 1, 13 and 169. Hence, we must say that 169 is a composite number.
- Thus, 169 is the composite number.
- If we multiply 169 by 1, 2, 3 then we get the multiples of 169 which are 169, 328, and so on.
About the number 169:
- 169 has more than two factors which are 1, 13 and 169 and hence it is the composite number.
- 169 is the odd composite number and it is the perfect square also.
- If we divide 169 by 1, 13 and 169 then we get remainder as zero. Hence, 1, 13 and 169 are the factors of 169.
Note:
- 169 is the perfect square.
- Factors of 169: 1, 13 and 169
- Prime factors of 169: 13
Conclusion:
- 169 is the composite number which has factors 1, 13 and 169.
- And hence, 169 is not the prime number.
Multiple Choice Questions:
1) 169 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 169 are
a) 1
b) 13
c) Both a and b
d) 1691
Ans: b) 13
3) 1 is the not prime factor of 169 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