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Data Sufficiency Practice Questions with Detailed Solutions – Level 3

Level 3 data sufficiency reasoning practice in which you judge whether statement I, statement II, both together or neither gives enough data to answer each question.

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Questions, answer key and solutions.

Questions
50
Duration
60 min
Marks
50

Negative marking

Attempts
100
Access
Free
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Normal practice, or a Simulated test

Both use the same questions. Normal practice is untimed and needs no account: choose an option and the answer and solution appear at once. The Simulated test is the real computer-based format, with one 60-minute clock, a question palette and full screen, and your score, the key and the solutions arrive when you submit.

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How the two modes differ
No account needed

Normal

Untimed

Every question on one page, loading as you scroll. Choose an option and see straight away whether it was right.

  • No timer. Nothing to start and nothing to submit. Stop whenever you like.
  • Answered as you choose. Tap an option and it is marked at once, with the correct answer shown.
  • Solutions in place. The explanation, and the video where one has been added, sit under the question.
  • Open to guests. Normal practice needs no sign-in.
Real exam conditions

Simulated

Timed CBT

The computer-based test format: one clock, a question palette, and a score the moment you submit.

  • A clock that does not pause. 60 minutes from the moment you begin, and the paper is submitted for you when it reaches zero.
  • Question palette. Answered, not answered and marked for review, section by section, as the real interface has it.
  • Full screen, proctored. The test takes over the screen; leaving it three times submits the paper.
  • Answers hidden until you submit. The key, the explanations and your score all arrive together at the end.

About this test

Data Sufficiency Reasoning Practice Quiz Level 3 with Solutions

This Level 3 set tests one skill in logical reasoning: judging whether two given statements give enough data to answer a question. Each item pairs a question with statements I and II. On Aptitude360, every question has a worked solution that explains whether statement I alone, statement II alone, both together or neither is sufficient, and why.

What these Level 3 data sufficiency questions test

  • Deciding whether statement I alone gives a definite answer
  • Deciding whether statement II alone gives a definite answer
  • Recognising when each statement works on its own
  • Spotting cases where the two statements are needed together
  • Identifying questions that stay unanswered even with both statements

Key data sufficiency concepts to revise

  • The difference between being sufficient alone and being sufficient only in combination
  • Judging each statement independently, without carrying information across from the other
  • Telling a single definite answer apart from a set of possible answers
  • Treating a definite 'no' as a sufficient answer, just like a definite 'yes'

Revision tips for data sufficiency reasoning

  • Stop working as soon as you know whether a unique answer exists, without solving fully
  • Test statement I alone, then statement II alone, and combine them only if both fail
  • Make a separate rough sketch or note for each statement so the facts stay apart
  • Before choosing 'neither is sufficient', check for at least two possible outcomes even after combining

Who should take this data sufficiency set

It suits logical reasoning aspirants who already understand the two-statement format and want Level 3 practice in judging sufficiency.

FAQs about Data Sufficiency Practice Questions with Detailed Solutions – Level 3

What is data sufficiency in reasoning?
Data sufficiency is a question type in which a question is followed by statements, and you decide whether those statements give enough information to answer it. You judge sufficiency rather than working out the final answer.
What are the options in data sufficiency questions?
The usual options are: statement I alone is sufficient, statement II alone is sufficient, either statement alone is sufficient, both statements together are needed, or even both together are not sufficient.
How to solve data sufficiency questions quickly?
Check each statement on its own first, and combine them only if neither works alone. Stop once you know whether a single definite answer can be reached.
What is the difference between data sufficiency in aptitude and reasoning?
In quantitative aptitude, the statements usually give numerical data for a maths problem. In reasoning, they give logical information, and you judge whether it fixes a unique answer.

Test structure

How the paper is split, and how long each part runs. A section you have finished cannot be returned to.

SectionQuestionsTime
Data Sufficiency Level 35060 min

Marking & rules

Total marks
50 across 50 questions.
Negative marking
A wrong answer costs marks. Leaving a question unanswered costs nothing.
Attempts
100 in total. An attempt is spent the moment you begin one.

What you get when you submit

The analysis is ready the moment you submit the paper.

Score and accuracy

Marks, percentage, right, wrong and skipped, and the time you took.

Section by section

The same figures for each section, so a weak one cannot hide in an average.

The full answer key

Every question with your answer, the right one, the working, and the video where there is one.

Where you stand

Your score against the spread of everyone else who has sat this test.

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