Is 2786 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 2786 is composite or not first we have to find its factors.
Contents
Factors of 2786:
- If we have taken numbers from 1, 2, 3…for checking factors of 2786, we found that 2786 has factors 1, 2, 7, 14, 199, 398, 1393 and 2786. Hence, we must say that 2786 is a composite number.
- Thus, 2786 is the composite number.
- If we multiply 2786 by 1, 2, 3 then we get the multiples of 2786 which are 2786, 5572 and so on.
About the number 2786:
- 2786 has more than two factors which are 1, 2, 7, 14, 199, 398, 1393 and 2786 and hence it is the composite number.
- 2786 is the even composite number and it is not the perfect square also.
- If we divide 2786 by, 1, 2, 7, 14, 199, 398, 1393 and 2786 then we get remainder as zero. Hence, 1, 2, 7, 14, 199, 398, 1393 and 2786 are the factors of 2786.
Note:
- 2786 is not the perfect square.
- Factors of 2786: 1, 2, 7, 14, 199, 398, 1393 and 2786
- Prime factors of 2786: 2, 7, 199
Conclusion:
- 2786 is the composite number which has factors, 1, 2, 7, 14, 199, 398, 1393 and 2786
- And hence, 2786 is not the prime number.
Multiple Choice Questions:
1) 2786 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 2786 are
a) 2786
b) 2, 7, 199
c) 14, 398, 1393 and 2786
d) 1, 2, 7, 14, 199, 398, 1393 and 2786
Ans: c) 14, 398, 1393 and 2786
3) 2786 is even composite number because
a) It has factors 1, 2, 7, 14, 199, 398, 1393 and 2786
b) It has only two factors
c) Divisible by 2
d) Both a and c
Ans: d) both a and c