Is 1955 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 1955 is composite or not first we have to find its factors.
Contents
Factors of 1955:
- If we have taken numbers from 1, 2, 3…for checking factors of 1955, we found that 1955 has factors 1, 5, 17, 23, 85, 115, 391 and 1955. Hence, we must say that 1955 is a composite number.
- Thus, 1955 is the composite number.
- If we multiply 1955 by 1, 2, 3 then we get the multiples of 1955 which are 1955, 3910 and so on.
1955 is a Composite number or Prime number
About the number 1955:
- 1955 has more than two factors which are 1, 5, 17, 23, 85, 115, 391 and 1955 and hence it is the composite number.
- 1955 is the odd composite number and it is not the perfect square also.
- If we divide 1955 by 1, 5, 17, 23, 85, 115, 391 and 1955 then we get remainder as zero. Hence, 1, 5, 17, 23, 85, 115, 391 and 1955 are the factors of 1955
Note:
- 1955 is not the perfect square.
- Factors of 1955: 1, 5, 17, 23, 85, 115, 391 and 1955
- Prime factors of 1955: 5, 17, 23
Conclusion:
- 1955 is the composite number which has factors 1, 5, 17, 23, 85, 115, 391 and 1955.
- And hence, 1955 is not the prime number.
Multiple Choice Questions:
1) 1955 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 1955 are
a) 1
b) 5, 17, 23
c) 1, 85, 115, 391 and 1955
d) 1, 5, 17, 23, 85, 115, 391 and 1955
Ans: c) 1, 85, 115, 391 and 1955
3) 1955 is the odd composite number because
a) It has factors 1, 5, 17, 23, 85, 115, 391 and 1955
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all