Data Sufficiency 1
In this type of reasoning questions, each question is followed by two statements numbered I and II. You are required to analyze the data of both the statements and decide whether the statements are sufficient to answer the question. After analyzing the statements, you have to choose the appropriate answer out of the four answer choices which are as follows;
1) What is Geeta's rank in the class?
I. There are 30 students in the class.
From statements I and II, we conclude that out of 30 students 10 students scored less than Geeta. It means, 19 students scored more than Geeta. So, Geeta's rank in the class is 20th. Thus, both the statements are needed to answer the question.
2) Who is the mother of B?
I. P and Q are sisters.
Statement (I) is not sufficient and statement II concludes that Q is the sister-in-law of B. So, even from both the statements, we cannot get the answer.
3) It is 6:00 pm, when can Deepak get next bus from Noida to Delhi?
I. Buses for Delhi leave after every 30 minutes, until 11 pm.
It is 6:00 pm and 20 minutes ago a bus had left for Delhi, so at 5:40 pm the bus had left. After every 30 minutes a bus leaves for Delhi, so Deepak will get the next bus at 6:10 pm. So, both I and II are needed to answer the question.
4) When is Rahul's birthday this year?
I. It is between March 8 and 10, March 8 being the Wednesday.
From statement I, we can conclude that Rahul's birthday is on March 9 which is Thursday. Statement II is not sufficient.
5) On which day of the week did Sohan reach Mumbai?
I. Sohan left Delhi by train on Wednesday.
The statement I shows that Sohan started his journey on Wednesday. The statement II shows that he completed his journey in two days. So, from both the statements, we conclude that Sohan reached Mumbai on Friday (Wednesday+2). Thus, both I and II are needed to answer the question.
Data Sufficiency 2
Data Sufficiency 3
Data Sufficiency 4