Is 1775 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 1775 is composite or not first we have to find its factors.
Contents
Factors of 1775:
- If we have taken numbers from 1, 2, 3…for checking factors of 1775, we found that 1775 has factors 1, 5, 25, 71, 355 and 1775. Hence, we must say that 1775 is a composite number.
- Thus, 1775 is the composite number.
- If we multiply 1775 by 1, 2, 3 then we get the multiples of 1775 which are 1775, 3550 and so on.
1775 is a Composite number or Prime number
About the number 1775:
- 1775 has more than two factors which are 1, 5, 25, 71, 355 and 1775 and hence it is the composite number.
- 1775 is the odd composite number and it is not the perfect square also.
- If we divide 1775 by 1, 5, 25, 71, 355 and 1775 then we get remainder as zero. Hence, 1, 5, 25, 71, 355 and 1775 are the factors of 1775
Note:
- 1775 is not the perfect square.
- Factors of 1775: 1, 5, 25, 71, 355 and 1775
- Prime factors of 1775: 5, 71
Conclusion:
- 1775 is the composite number which has factors 1, 5, 25, 71, 355 and 1775.
- And hence, 1775 is not the prime number.
Multiple Choice Questions:
1) 1775 is a
a) Even number
b) Prime number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The non-prime factors of a composite number 1775 are
a) 1
b) 5, 71
c) 1, 25, 355 and 1775
d) 1, 5, 25, 71, 355 and 1775
Ans: b) 1, 25, 355 and 1775
3) 1775 is the odd composite number because
a) It has factors 1, 5, 25, 71, 355 and 1775
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all