Is 162 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 162 is composite or not first we have to find its factors.
Contents
Factors of 162:
- If we have taken numbers from 1, 2, 3…for checking factors of 162, we found that 162 has factors 1, 2, 3, 9, 27, 54, 81 and 162. Hence, we must say that 162 is a composite number.
- Thus, 162 is the composite number.
- If we multiply 162 by 1, 2, 3 then we get the multiples of 162 which are 162, 324, and so on.
About the number 162:
- 162 has more than two factors which are 1, 2, 3, 9, 27, 54, 81 and 162 and hence it is the composite number.
- 162 is the even composite number and it is not the perfect square also.
- If we divide 162 by 1, 2, 3, 9, 27, 54, 81 and 162 then we get remainder as zero. Hence, 1, 2, 3, 9, 27, 54, 81 and 162 are the factors of 162.
Note:
- 162 is not the perfect square.
- Factors of 162: 1, 2, 3, 9, 27, 54, 81 and 162
- Prime factors of 162: 2, 3
Conclusion:
- 162 is the composite number which has factors 1, 2, 3, 9, 27, 54, 81 and 162.
- And hence, 162 is not the prime number.
Multiple Choice Questions:
1) 162 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 162 are
a) 1
b) 2, 3
c) Both a and b
d) 1621
Ans: b) 2, 3
3) 1 is the not prime factor of 162 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