Is 1778 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 1778 is composite or not first we have to find its factors.
Contents
Factors of 1778:
- If we have taken numbers from 1, 2, 3…for checking factors of 1778, we found that 1778 has factors 1, 2, 7, 14, 127, 254, 889 and 1778. Hence, we must say that 1778 is a composite number.
- Thus, 1778 is the composite number.
- If we multiply 1778 by 1, 2, 3 then we get the multiples of 1778 which are 1778, 3556 and so on.
About the number 1778:
- 1778 has more than two factors which are 1, 2, 7, 14, 127, 254, 889 and 1778 and hence it is the composite number.
- 1778 is the even composite number and it is not the perfect square also.
- If we divide 1778 by 1, 2, 7, 14, 127, 254, 889 and 1778 then we get remainder as zero. Hence, 1, 2, 7, 14, 127, 254, 889 and 1778 are the factors of 1778.
Note:
- 1778 is not the perfect square.
- Factors of 1778: 1, 2, 7, 14, 127, 254, 889 and 1778
- Prime factors of 1778: 2, 7, 127
Conclusion:
- 1778 is the composite number which has factors 1, 2, 7, 14, 127, 254, 889 and 1778
- And hence, 1778 is not the prime number.
Multiple Choice Questions:
1) 1778 is a
a) Prime number
b) Odd number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The non-prime factors of a composite number 1778 are
a) 1778
b) 2, 7, 127
c) 1, 14, 254, 889 and 1778
d) 1, 2, 7, 14, 127, 254, 889 and 1778
Ans: c) 1, 14, 254, 889 and 1778
3) 1778 is composite number because
a) It has factors 1, 2, 7, 14, 127, 254, 889 and 1778
b) It has only two factors
c) Divisible by 2
d) Both a and c
Ans: a) it has factors 1, 2, 7, 14, 127, 254, 889 and 1778