Is 775 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 775 is composite or not first we have to find its factors.
Contents
Factors of 775:
- If we have taken numbers from 1, 2, 3…for checking factors of 775, we found that 775 has factors 1, 5, 25, 31, 155 and 775. Hence, we must say that 775 is a composite number.
- Thus, 775 is the composite number.
- If we multiply 775 by 1, 2, 3 then we get the multiples of 775 which are 775, 1530 and so on.
775 is a Composite number or Prime number
About the number 775:
- 775 has more than two factors which are 1, 5, 25, 31, 155 and 775 and hence it is the composite number.
- 775 is the odd composite number and it is not the perfect square also.
- If we divide 775 by 1, 5, 25, 31, 155 and 775 then we get remainder as zero. Hence, 1, 5, 25, 31, 155 and 775 are the factors of 775
Note:
- 775 is not the perfect square.
- Factors of 775: 1, 5, 25, 31, 155 and 775
- Prime factors of 775: 5, 31
Conclusion:
- 775 is the composite number which has factors 1, 5, 25, 31, 155 and 775.
- And hence, 775 is not the prime number.
Multiple Choice Questions:
1) 775 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 775 are
a) 1
b) 5, 31
c) 1, 25, 155 and 775
d) 1, 5, 25, 31, 155 and 775
Ans: b) 5, 31
3) 775 is the odd composite number because
a) It has factors 1, 5, 25, 31, 155 and 775
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c