NTT Data Data Sufficiency Quiz-1

From both I and II, we find that Dhoni is (28 - 21) = 7 years older than his brother, who was born in 2001. So, Dhoni was born in 1996.

From I, we conclude that the weight of each book = (4x5) kg = 20 kg.

So, total weight of 10 books = (20 x 10) kg = 200 kg.

From II, we conclude that:

Weight of each book = (weight of 3 book) - (weight of 2 book) = 20 kg.

So, total weight of 10 books = (20 x 10) kg = 200 kg.

From I, we conclude that Harsha is the only daughter of Mahi. But this does not indicate that Mahi has no son. The information given in II is immaterial.

From I, total sale of 8000 units of masks  = Rs. (2500 x 15) = Rs. 37500.

From II, we know that the company deals only in masks

This implies that sale of masks is the total sale of the shop, which is Rs. 37500

From I, we conclude that 5th, 12th, 19th and 26th of March, 2006 were Sundays.

So, last Sunday fell on the 26th.

From II, we conclude that 31st March, 2006 was Friday. Thus, 26th March, 2006 was the last Sunday of the month.

The only word common to I and II is 'good' and as such, only the code for ‘good' can be ascertained from the given information.

From II, B being in the middle, there are 10 people to his right as well as to his left. So, B is 11th from the left. From I, A is 15th from the left. Thus, from both I and II, we conclude that there are 3 people between A and B.

From I, we know that C is X's brother and B's husband. Since C is the only son of his parents, X is C's sister. From II, we know that Y is C's daughter. Thus, from I and II, we conclude that X is the sister of Y's father i.e. X is Y's aunt.

From I, we have the order: Rose, -, Prakash, Qutub.

 From II, we have the order: Prakash, Qutub, Tappu. 

Clearly, each one of the above two orders indicates that Qutub is to the immediate right of Prakash.

From I and II, we conclude that Anamika was born in February 2004 on a date which is an even prime number. Since the only even prime number is 2, Anamika was born on 2nd February, 2004.