Is 778 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 778 is composite or not first we have to find its factors.
Contents
Factors of 778:
- If we have taken numbers from 1, 2, 3…for checking factors of 778, we found that 778 has factors 1, 2, 389 and 778. Hence, we must say that 778 is a composite number.
- Thus, 778 is the composite umber.
- If we multiply 778 by 1, 2, 3 then we get the multiples of 778 which are 778, 1556 and so on.
About the number 778:
- 778 has more than two factors which are 1, 2, 389 and 778 and hence it is the composite number.
- 778 is the even composite number and it is not the perfect square also.
- If we divide 778 by 1, 2, 389 and 778 then we get remainder as zero. Hence, 1, 2, 389 and 778 are the factors of 778.
Note:
- 778 is not the perfect square.
- Factors of 778: 1, 2, 389 and 778
- Prime factors of 778: 2, 389
Conclusion:
- 778 is the composite number which has factors 1, 2, 389 and 778
- And hence, 778 is not the prime number.
Multiple Choice Questions:
1) 778 is a
a) Odd number
b) Prime number
c) Composite number
d) Both b and c
Ans: c) composite number
2) The prime factors of a composite number 778 are
a) 1
b) 2, 389
c) 1 and 778
d) 1, 2, 389 and 778
Ans: b) 2, 389
3) 778 is the composite number because
a) It has factors 1, 2, 389 and 778
b) It has only prime factors
c) Divisible by 2
d) Both a and b
Ans: a) It has factors 1, 2, 389 and 778