Is 786 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 786 is composite or not first we have to find its factors.
Contents
Factors of 786:
- If we have taken numbers from 1, 2, 3…for checking factors of 786, we found that 786 has factors 1, 2, 3, 6, 131, 262, 393 and 786. Hence, we must say that 786 is a composite number.
- Thus, 786 is the composite umber.
- If we multiply 786 by 1, 2, 3 then we get the multiples of 786 which are 786, 1572 and so on.
About the number 786:
- 786 has more than two factors which are 1, 2, 3, 6, 131, 262, 393 and 786 and hence it is the composite number.
- 786 is the even composite number and it is not the perfect square also.
- If we divide 786 by 1, 2, 3, 6, 131, 262, 393 and 786 then we get remainder as zero. Hence, 1, 2, 3, 6, 131, 262, 393 and 786 are the factors of 786.
Note:
- 786 is not the perfect square.
- Factors of 786: 1, 2, 3, 6, 131, 262, 393 and 786
- Prime factors of 786: 2, 3, 131
Conclusion:
- 786 is the composite number which has factors 1, 2, 3, 6, 131, 262, 393 and 786
- And hence, 786 is not the prime number.
Multiple Choice Questions:
1) 786 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 786 are
a) 1
b) 2, 3, 131
c) 1, 6, 262, 393 and 786
d) 1, 2, 3, 6, 131, 262, 393 and 786
Ans: b) 2, 3, 131
3) 786 is the composite number because
a) It has factors 1, 2, 3, 6, 131, 262, 393 and 786
b) It has only prime factors
c) Divisible by 2
d) Both a and b
Ans: a) It has factors 1, 2, 3, 6, 131, 262, 393 and 786