Is 170 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 170 is composite or not first we have to find its factors.
Contents
Factors of 170:
- If we have taken numbers from 1, 2, 3…for checking factors of 170, we found that 170 has factors 1, 2, 5, 10, 17, 34, 85 and 170. Hence, we must say that 170 is a composite number.
- Thus, 170 is the composite number.
- If we multiply 170 by 1, 2, 3 then we get the multiples of 170 which are 170, 340, and so on.
About the number 170:
- 170 has more than two factors which are 1, 2, 5, 10, 17, 34, 85 and 170 and hence it is the composite number.
- 170 is the even composite number and it is not the perfect square also.
- If we divide 170 by 1, 2, 5, 10, 17, 34, 85 and 170 then we get remainder as zero. Hence, 1, 2, 5, 10, 17, 34, 85 and 170 are the factors of 170.
Note:
- 170 is not the perfect square.
- Factors of 170: 1, 2, 5, 10, 17, 34, 85 and 170
- Prime factors of 170: 2, 5, 17
Conclusion:
- 170 is the composite number which has factors 1, 2, 5, 10, 17, 34, 85 and 170.
- And hence, 170 is not the prime number.
Multiple Choice Questions:
1) 170 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 170 are
a) 1
b) 2, 5, 17
c) Both a and b
d) 1701
Ans: b) 2, 5, 17
3) 1 is the not prime factor of 170 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