Is 790 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 790 is composite or not first we have to find its factors.
Contents
Factors of 790:
- If we have taken numbers from 1, 2, 3…for checking factors of 790, we found that 790 has factors 1, 2, 5, 10, 79, 158, 395 and 790. Hence, we must say that 790 is a composite number.
- Thus, 790 is the composite umber.
- If we multiply 790 by 1, 2, 3 then we get the multiples of 790 which are 790, 1580 and so on.
About the number 790:
- 790 has more than two factors which are 1, 2, 5, 10, 79, 158, 395 and 790 and hence it is the composite number.
- 790 is the even composite number and it is not the perfect square also.
- If we divide 790 by 1, 2, 5, 10, 79, 158, 395 and 790 then we get remainder as zero. Hence, 1, 2, 5, 10, 79, 158, 395 and 790 are the factors of 790.
Note:
- 790 is not the perfect square.
- Factors of 790: 1, 2, 5, 10, 79, 158, 395 and 790
- Prime factors of 790: 2, 5, 79
Conclusion:
- 790 is the composite number which has factors 1, 2, 5, 10, 79, 158, 395 and 790
- And hence, 790 is not the prime number.
Multiple Choice Questions:
1) 790 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 790 are
a) 1
b) 2, 5, 79
c) 1, 10, 158, 395 and 790
d) 1, 2, 5, 10, 79, 158, 395 and 790
Ans: b) 2, 5, 79
3) 790 is the composite number because
a) It has factors 1, 2, 5, 10, 79, 158, 395 and 790
b) It has only prime factors
c) Divisible by 2
d) Both a and b
Ans: a) It has factors 1, 2, 5, 10, 79, 158, 395 and 790