Data Sufficiency Practice Questions & Answers- Important for RBI Assistant Mains

RBI Assistant Mains 2023 exam is scheduled for 31st Dec which is just around the corner. It’s time for the candidates to revise the already learned concepts and since only a few days are left, aspirants can practice questions from important topics. In this blog today we have come up with Data Sufficiency Practice Questions & Answers PDF. Data Sufficiency is quite an important concept, however the best way to ace the concept and thus the section is to practice more and more questions on the same. Below we are providing a set of practice questions, answers along with detailed solutions. To begin with, let’s first take a look at the RBI Assistant Mains exam pattern. 

RBI Assistant Mains Free Mock Test 2023

RBI Assistant Mains Exam Pattern

Sections	No. of Questions	Maximum Marks	Duration
English Language	40	40	30 minutes
Quantitative Aptitude	40	40	30 minutes
Reasoning Ability	40	40	30 minutes
Computer Knowledge	40	40	20 minutes
General Awareness	40	40	25 minutes
Total	200	200	135 minutes

3 Data Sufficiency questions with solutions

Here are 3 Data Sufficiency questions with solutions designed specifically for the RBI Assistant Mains Exam. These cover common types asked in Reasoning and Quantitative sections.

Question 1 (Reasoning – Blood Relation)

Q: How is A related to B?
Statements:

1. C is the brother of A.
2. B is the mother of C.

Options:
a) Statement 1 alone is sufficient
b) Statement 2 alone is sufficient
c) Both statements together are sufficient
d) Neither statement is sufficient
e) Either statement alone is sufficient

Solution:

• Statement 1: C is A’s brother → No info about B
• Statement 2: B is C’s mother → No info about A
• Together: C is A’s brother and B is C’s mother → So B is also A’s mother

Answer: c) Both statements together are sufficient

Question 2 (Quant – Number Series)

Q: What is the 6th term in the number series?
Statements:

1. The first three terms of the series are 2, 4, and 8.
2. The pattern of the series is multiplying by 2.

Options:
a) Statement 1 alone is sufficient
b) Statement 2 alone is sufficient
c) Both statements together are sufficient
d) Neither statement is sufficient
e) Either statement alone is sufficient

Solution:

• Statement 1: 2, 4, 8 → May be multiplying by 2 or adding powers (uncertain)
• Statement 2: Pattern is multiply by 2 → If first term is known, this is enough
• Together: First three terms and the rule → Clearly gives 6th term = 2 × 2 × 2 × 2 × 2 = 64

Answer: c) Both statements together are sufficient

Question 3 (Quant – Time & Work)

Q: In how many days can A complete the work alone?
Statements:

1. A and B together can complete the work in 10 days.
2. B alone can complete the work in 15 days.

Options:
a) Statement 1 alone is sufficient
b) Statement 2 alone is sufficient
c) Both statements together are sufficient
d) Neither statement is sufficient
e) Either statement alone is sufficient

Solution:

• Statement 1: Combined work rate, but no individual rate for A
• Statement 2: B’s rate alone, but nothing about A
• Together: Can calculate A’s work = 1/10 – 1/15 = 1/30 → A alone takes 30 days

Answer: c) Both statements together are sufficient