Is 490 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 490 is composite or not first we have to find its factors.
Contents
Factors of 490:
- If we have taken numbers from 1, 2, 3…for checking factors of 490, we found that 490 has factors 1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245 and 490. Hence, we must say that 490 is a composite number.
- Thus, 490 is the composite umber.
- If we multiply 490 by 1, 2, 3 then we get the multiples of 490 which are 490, 980 and so on.
About the number 490:
- 490 has more than two factors which are 1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245 and 490 and hence it is the composite number.
- 490 is the even composite number and it is not the perfect square also.
- If we divide 490 by 1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245 and 490 then we get remainder as zero. Hence, 1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245 and 490 are the factors of 490.
Note:
- 490 is not the perfect square.
- Factors of 490:1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245 and 490
- Prime factors of 490: 2, 5, 7
Conclusion:
- 490 is the composite number which has factors 1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245 and 490
- And hence, 490 is not the prime number.
Multiple Choice Questions:
1) 490 is a
a) Prime number
b) Even number
c) Composite number
d) Both b and c
Ans: d) both b and c
2) The prime factors of a composite number 490 are
a) 1
b) 2, 5, 7
c) 1, 10, 14, 35, 49, 70, 98, 245 and 490
d) 1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245 and 490
Ans: b) 2, 5, 7
3) 490 is the even composite number because
a) It has two factors
b) More than two factors
c) Divisible by 2
d) Both b and c
Ans: d) both b and c