Is 798 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 798 is composite or not first we have to find its factors.
Contents
Factors of 798:
- If we have taken numbers from 1, 2, 3…for checking factors of 798, we found that 798 has factors 1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 133, 266, 399 and 798. Hence, we must say that 798 is a composite number.
- Thus, 798 is the composite umber.
- If we multiply 798 by 1, 2, 3 then we get the multiples of 798 which are 798, 1596 and so on.
About the number 798:
- 798 has more than two factors which are 1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 133, 266, 399 and 798 and hence it is the composite number.
- 798 is the even composite number and it is not the perfect square also.
- If we divide 798 by 1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 133, 266, 399 and 798 then we get remainder as zero. Hence, 1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 133, 266, 399 and 798 are the factors of 798.
Note:
- 798 is not the perfect square.
- Factors of 798: 1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 133, 266, 399 and 798
- Prime factors of 798: 2, 3, 7, 19
Conclusion:
- 798 is the composite number which has factors 1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 133, 266, 399 and 798
- And hence, 798 is not the prime number.
Multiple Choice Questions:
1) 798 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 798 are
a) 1
b) 2, 3, 7, 19
c) 1, 6, 14, 21, 38, 42, 57, 114, 133, 266, 399 and 798
d) 1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 133, 266, 399 and 798
Ans: b) 2, 3, 7, 19
3) 798 is the composite number because
a) It has factors 1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 133, 266, 399 and 798
b) It has only prime factors
c) Divisible by 2
d) Both a and b
Ans: a) It has factors 1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 133, 266, 399 and 798