a maths question
Posted:
Tue May 05, 2009 10:44 pmby himadri
hiii guys....i'm dealing with a prob in maths n hope you'll can solve it.
the question is:-
"Expalin why 7*11*13+13 and 7*6*5*4*3*2*1+5 are composite numbers?"
Re: a maths question
Posted:
Fri May 15, 2009 9:17 amby pspoornima
Prime number is the natural number, which is greater than 1 and divisible by one and by itself only, is called a prime number.
For eg- 3, 3 is divisible 3 & 1
Composite number which is greater than 1 and is not prime and is called a composite number i.e it is divisble by number other than itself and 1.
For Eg- 8- divisible by 2,4,8,1.
In this case
7*11*13+13= 1014
1014 is divisible by 2,3,6,13,39,26
Since 1014 is divisible by more than the number itself and 1, it is a composite number.
7*6*5*4*3*2*1+5= 5045
5045 is divisible by 5 & 1009
Since 5045 is divisible by more than the number itself and 2, it is a composite number.