Is 4991 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 4991 is composite or not first we have to find its factors.
Contents
Factors of 4991:
- If we have taken numbers from 1, 2, 3…for checking factors of 4991, we found that 4991 has factors 1, 7, 23, 31, 161, 217, 713 and 4991. Hence, we must say that 4991 is a composite number.
- Thus, 4991 is the composite number.
- If we multiply 4991 by 1, 2, 3 then we get the multiples of 4991 which are 4991, 9982 and so on.
4991 is a Composite number or Prime number
About the number 4991:
- 4991 has more than two factors which 1, 7, 23, 31, 161, 217, 713 and 4991 are hence it is the composite number.
- 4991 is the odd composite number and it is not the perfect square also.
- If we divide 4991 by 1, 7, 23, 31, 161, 217, 713 and 4991 then we get remainder as zero. Hence 1, 7, 23, 31, 161, 217, 713 and 4991 are the factors of 4991.
Note:
- 4991 is not the perfect square.
- Factors of 4991:1, 7, 23, 31, 161, 217, 713 and 4991
- Prime factors of 4991:7, 23, 31
Conclusion:
- 4991 is the composite number which has factors 1, 7, 23, 31, 161, 217, 713 and 4991.
- And hence, 4991 is not the prime number.
Multiple Choice Questions:
1) 4991 is a
a) odd number
b) Prime number
c) Composite number
d) Both a and c
Ans: d) both a and c
2) The prime factors of a composite number 4991 are
a) 1
b) 7, 23, 31
c) 1, 7, 23, 31, 161, 217, 713 and 4991
d) 1, 161, 217, 713 and 4991
Ans: b) 7, 23, 31
3) 4991 is the composite number because
a) It has factors 1, 7, 23, 31, 161, 217, 713 and 4991
b) It has more than two factors
c) It is not divisible by 2
d) Both a and b
Ans: d) both a and b
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