Is 789 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 789 is composite or not first we have to find its factors.
Contents
Factors of 789:
- If we have taken numbers from 1, 2, 3…for checking factors of 789, we found that 789 has factors 1, 3, 263 and 789. Hence, we must say that 789 is a composite number.
- Thus, 789 is the composite number.
- If we multiply 789 by 1, 2, 3 then we get the multiples of 789 which are 789, 1578 and so on.
789 is a Composite number or Prime number
About the number 789:
- 789 has more than two factors which are 1, 3, 263 and 789 and hence it is the composite number.
- 789 is the odd composite number and it is not the perfect square also.
- If we divide 789 by 1, 3, 263 and 789 then we get remainder as zero. Hence, 1, 3, 263 and 789 are the factors of 789
Note:
- 789 is not the perfect square.
- Factors of 789: 1, 3, 263 and 789
- Prime factors of 789: 3, 263
Conclusion:
- 789 is the composite number which has factors 1, 3, 263 and 789.
- And hence, 789 is not the prime number.
Multiple Choice Questions:
1) 789 is a
a) odd 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 789 are
a) 1
b) 3, 263
c) 1 and 789
d) 1, 3, 263 and 789
Ans: b) 3, 263
3) 789 is the odd composite number because
a) It has factors 1, 3, 263 and 789
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c