Is 86 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 86 is composite or not first we have to find its factors.
Contents
Factors of 86:
- If we have taken numbers from 1, 2, 3…for checking factors of 86, we found that 86 has factors 1, 2, 43 and 86. Hence, we must say that 86 is a composite number.
- Thus, 86 is the composite number.
- If we multiply 86 by 1, 2, 3 then we get the multiples of 86 which are 86, 172, and so on.
About the number 86:
- 86 has more than two factors which are 1,2, 43and 86 and hence it is the composite number.
- 86 is the even composite number and it is not the perfect square also.
- If we divide 86 by 1, 2, 43 and 86 then we get remainder as zero. Hence, 1, 2, 43 and 86 are the factors of 86.
Note:
- 86 is not the perfect square.
- Factors of 86: 1, 2, 43 and 86
- Prime factors of 86: 2, 43
Conclusion:
- 86 is the composite number which has factors 1, 2, 43and 86.
- And hence, 86 is not the prime number.
Multiple Choice Questions:
1) 86 is a
a) even 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 86 are
a) 1
b) 2, 43
c) Both a and b
d) 861
Ans: b)5, 17
3) 1 is the not prime factor of 86 because
a) It is the prime number
b) 1 is neither prime nor composite number
c) Both a and b
d) Given statement is false
Ans: b) 1 is neither prime nor composite number