1.

Is 7*5*3*2+3a composite number? Justify ypur answer

Answer»

Heya GUYS....

yes it would be a Composite number, since the product 7*5*3*2 is divisible by 3 so the number 7*5*3*2+3 will ALSO be divisible by 3 hence it would be a composite number, 
If you divide 7*5*3*2 by 3 the answer will simply be 7*5*2 now, 
consider the multiplication 3* (7*5*2+1) the answer will be 7*5*3*2+3 hence this number has factor other than one... 
In other words you can TAKE 3 common from the given expression 7*5*3*2+3 and WRITE it in form- 
3(7*5*2+1) which proves the fact that 7*5*3*2+3 is a composite number. :)


Discussion

No Comment Found

Related InterviewSolutions