What theorem should be used ?

[jbom]

What theorem should be used to find sequential page numbers if the product is 110?

New user jbom

 

[pka]

What theorem should be used to find sequential page numbers if the product is 110?

Can you solve \(\displaystyle n(n+1)=110~?\)

 

[jbom]

reply-What theorem should be used?

Are you suggesting: n(n-1)=110 n^2+n-110=0 ?

 

[daon2]

Are you suggesting: n(n-1)=110 n^2+n-110=0 ?

Hint: 110 ends in a 0, so either one of n or n-1 ends in a 0, or one ends in a 5 and the other ends in a 2. The latter case cannot be, because they are sequential, so...

 

[pka]

Are you suggesting: n(n-1)=110 n^2+n-110=0 ?

The 'back-of-the-book' tells us that the answer is \(\displaystyle 10,~11\).
Why is that so?

 

[jbom]

solved

Thanks for help but figured out the answer had to have 10 to produce product 110. x*y=110 10*11=110