Is 2990 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 2990 is composite or not first we have to find its factors.
Contents
Factors of 2990:
- If we have taken numbers from 1, 2, 3…for checking factors of 2990, we found that 2990 has factors 1, 2, 5, 10, 13, 23, 26, 46, 65, 115, 130, 230, 299, 598, 1495 and 2990. Hence, we must say that 2990 is a composite number.
- Thus, 2990 is the composite number.
- If we multiply 2990 by 1, 2, 3 then we get the multiples of 2990 which are 2990, 5980 and so on.
About the number 2990:
- 2990 has more than two factors which are 1, 2, 5, 10, 13, 23, 26, 46, 65, 115, 130, 230, 299, 598, 1495 and 2990 and hence it is the composite number.
- 2990 is the even composite number and it is not the perfect square also.
- If we divide 2990 by, 1, 2, 5, 10, 13, 23, 26, 46, 65, 115, 130, 230, 299, 598, 1495 and 2990 then we get remainder as zero. Hence, 1, 2, 5, 10, 13, 23, 26, 46, 65, 115, 130, 230, 299, 598, 1495 and 2990 are the factors of 2990.
Note:
- 2990 is not the perfect square.
- Factors of 2990: 1, 2, 5, 10, 13, 23, 26, 46, 65, 115, 130, 230, 299, 598, 1495 and 2990
- Prime factors of 2990: 2, 5, 13, 23
Conclusion:
- 2990 is the composite number which has factors, 1, 2, 5, 10, 13, 23, 26, 46, 65, 115, 130, 230, 299, 598, 1495 and 2990
- And hence, 2990 is not the prime number.
Multiple Choice Questions:
1) 2990 is a
a) Prime number
b) Odd number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The composite factors of a composite number 2990 are
a) 2990
b) 2, 5, 13, 23
c) 10, 26, 46, 65, 115, 130, 230, 299, 598, 1495 and 2990
d) 1, 2, 5, 10, 13, 23, 26, 46, 65, 115, 130, 230, 299, 598, 1495 and 2990
Ans: c) 10, 26, 46, 65, 115, 130, 230, 299, 598, 1495 and 2990
3) 2990 is even composite number because
a) It has factors 1, 2, 5, 10, 13, 23, 26, 46, 65, 115, 130, 230, 299, 598, 1495 and 2990
b) It has only two factors
c) Divisible by 2
d) Both a and c
Ans: d) both a and c