Is 1554 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 1554 is composite or not first we have to find its factors.
Contents
Factors of 1554:
- If we have taken numbers from 1, 2, 3…for checking factors of 1554, we found that 1554 has factors 1, 2, 3, 6, 7, 14, 21, 37, 42, 74, 111, 222, 259, 518, 777 and 1554. Hence, we must say that 1554 is a composite number.
- Thus, 1554 is the composite number.
- If we multiply 1554 by 1, 2, 3 then we get the multiples of 1554 which are 1554, 3108 and so on.
About the number 1554:
- 1554 has more than two factors which are 1, 2, 3, 6, 7, 14, 21, 37, 42, 74, 111, 222, 259, 518, 777 and 1554 and hence it is the composite number.
- 1554 is the even composite number and it is not the perfect square also.
- If we divide 1554 by 1, 2, 3, 6, 7, 14, 21, 37, 42, 74, 111, 222, 259, 518, 777 and 1554 then we get remainder as zero. Hence, 1, 2, 3, 6, 7, 14, 21, 37, 42, 74, 111, 222, 259, 518, 777 and 1554 are the factors of 1554.
Note:
- 1554 is not the perfect square.
- Factors of 1554: 1, 2, 3, 6, 7, 14, 21, 37, 42, 74, 111, 222, 259, 518, 777 and 1554
- Prime factors of 1554: 2, 3, 7, 37
Conclusion:
- 1554 is the composite number which has factors 1, 2, 3, 6, 7, 14, 21, 37, 42, 74, 111, 222, 259, 518, 777 and 1554
- And hence, 1554 is not the prime number.
Multiple Choice Questions:
1) 1554 is a
a) Even number
b) Odd number
c) Composite number
d) Both a and c
Ans: d) both a and c
2) The prime factors of a composite number 1554 are
a) 1554
b) 2, 3, 7, 37
c) 1, 6, 14, 21, 42, 74, 111, 222, 259, 518, 777 and 1554
d) 1, 2, 3, 6, 7, 14, 21, 37, 42, 74, 111, 222, 259, 518, 777 and 1554
Ans: b) 2, 3, 7, 37
3) 1554 is even composite number because
a) It has factors 1, 2, 3, 6, 7, 14, 21, 37, 42, 74, 111, 222, 259, 518, 777 and 1554
b) It has more than two factors
c) Divisible by 2
d) all
Ans: d) all