Is 551 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 551 is composite or not first we have to find its factors.
Contents
Factors of 551:
- If we have taken numbers from 1, 2, 3…for checking factors of 551, we found that 551 has factors 1, 19, 29 and 551. Hence, we must say that 551 is a composite number.
- Thus, 551 is the composite number.
- If we multiply 551 by 1, 2, 3 then we get the multiples of 551 which are 551, 1102 and so on.
551 is a Composite number or Prime number
About the number 551:
- 551 has more than two factors which are 1, 19, 29 and 551 and hence it is the composite number.
- 551 is the odd composite number and it is not the perfect square also.
- If we divide 551 by 1, 19, 29 and 551 then we get remainder as zero. Hence, 1, 19, 29 and 551 are the factors of 551.
Note:
- 551 is not the perfect square.
- Factors of 551: 1, 19, 29 and 551
- Prime factors of 551: 19, 29
Conclusion:
- 551 is the composite number which has factors 1, 19, 29 and 551.
- And hence, 551 is not the prime number.
Multiple Choice Questions:
1) 551 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 551 are
a) 1
b) 19, 29
c) 1 and 551
d) 1, 19, 29 and 551
Ans: b) 19, 29
3) 551 is the odd composite number because
a) It has factors 1, 19, 29 and 551
b) It is divisible by 2
c) It is not divisible by 2
d) Both a and c
Ans: d) both a and c