[adityarulz26]

hey can u guys xplain question 18 .. ans says dat option 3 is correct ..if the least value of i for which n(i) is even is even den S is odd
my doubt .. explanation accordin to d solution is dat all odd term are together n den the even terms are added .. but wat if after the first even term ders an odd term again ..
please if sum1 can xplain dis

[inava]

Originally Posted by adityarulz26

hey can u guys xplain question 18 .. ans says dat option 3 is correct ..if the least value of i for which n(i) is even is even den S is odd
my doubt .. explanation accordin to d solution is dat all odd term are together n den the even terms are added .. but wat if after the first even term ders an odd term again ..
please if sum1 can xplain dis

Lets take an example.

If i =2 and the least even n(i) is n(2).

Therefore, n(1) is odd.

Now, S = n(1) + n(1)n(2)

Even Number * Odd Number = Even Number.
Thus n(1)n(2) is even

Ans, Even + Odd = Odd
Thus n(1) + n(1)n(2) is Odd.

Thus, S is odd.

Hope this explains it.
Please revert in case of any further queries.

[adityarulz26]

Originally Posted by inava

Lets take an example.

If i =2 and the least even n(i) is n(2).

Therefore, n(1) is odd.

Now, S = n(1) + n(1)n(2)

Even Number * Odd Number = Even Number.
Thus n(1)n(2) is even

Ans, Even + Odd = Odd
Thus n(1) + n(1)n(2) is Odd.

Thus, S is odd.

Hope this explains it.
Please revert in case of any further queries.

thanks mate for replyin
yes i stil hav a doubt
referrin to ur example wer in d question is it mention dat n(3) cannot be odd or all terms after n(2) will only be even ... it is mentioned dat it is d least even in other words d first even

[inava]

Hey,

Could somebody please explain qn 58 to me.

I don't understand the importance or use of Operating Profit being written on the Graphs given.

Also, Shouldn't we just be comparing the Profitability Percentage, as aksed in the question?

[inava]

Originally Posted by adityarulz26

thanks mate for replyin
yes i stil hav a doubt
referrin to ur example wer in d question is it mention dat n(3) cannot be odd or all terms after n(2) will only be even ... it is mentioned dat it is d least even in other words d first even

Hi []

Well, it doesn't matter whether n(3) and so on are even or odd.

As,

n(2) is even.

All the terms after n(1)n(2) will contain n(2).

Now, Even number multiplied by any number gives an even number.

Thus, all the remaining terms will be even.

Which will show that only n(1) is odd.

Thus, S is odd.

Hope its clear this time []

[gauravpruthi]

SOMEONE PLEASE ANSWER THIS QUESTION

http://www.pagalguy.com/forum/cat-an...ml#post1711795 (Aimcat 1002)

[adityarulz26]

yes it is thnks