Actually this is one of the simpler sentence correction questions. As soon as we read the original statement we can cancel out all "not only...but also" formations. The reason is that the two sections of the statement do not convey the same negative / positive meaning. D clearly explains t...

330 is a small number to factorize...330 - 1*2*3*5*11....so you have 3,5 and 11...multiply with each other and all together : 15,55,15, 165..so total 7

Actually yes, B debunks both theories, : If the beetle were blind it would not change direction when the insect is moving around.Also, since the frequency of rest is the same whether going uphill or downhill means the reason for not stopping is not "tiredness"...since it is not supporting ...

Well, The study says that more the social interaction better the mental skills. We need to basically weaken this argument. Now B states that there are many medical conditions /treatments increase isolation. So in these "many " cases social interaction will not be a means to maintain mental...

We can use 100 as total number of people in the organization but we see a fraction 3/8 down the question. So better if we use an easier number like 80. Total Member : 80 Number of women : 30% of 80 = 24 Married Men : (3/8)*80 = 30 Unmarried Men : 80 - 24 -30 = 26 Now running through the options only...

This was my way of doing it stepwise :

5^21 * 4^11

5^10 * 5^11 * 4^11

5^10 * 20^11

5^10 * 2^11 * 10^11

5^10 * 2^10 * 2^1 10^11

10^10 * 2^1 * 10^11

2^1 * 10^21

hence n is 21