Skip to content
Book Free Demo

Data Sufficiency Practice Questions with Detailed Solutions – Level 1

Beginner data sufficiency practice where you decide whether statements I and II are enough to answer a reasoning question, with a worked solution for every question.

Start Test

Choose Normal practice or a Simulated test.

Questions, answer key and solutions.

Questions
50
Duration
50 min
Marks
50

Negative marking

Attempts
100
Access
Free
Share test:

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 50-minute clock, a question palette and full screen, and your score, the key and the solutions arrive when you submit.

Open Normal practiceTake the Simulated test
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. 50 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 Level 1 Practice Questions for Reasoning Beginners

This Level 1 set is for students at the start of logical reasoning preparation who want to understand how data sufficiency questions work. Each problem gives a question followed by statements I and II, and you decide whether the data given is enough to answer it. Aptitude360 provides a worked solution for every question so the reasoning behind each choice is clear.

What this beginner data sufficiency set covers

  • Reading a question carefully before looking at the statements
  • Judging statement I on its own
  • Judging statement II on its own
  • Deciding whether both statements together settle the answer
  • Recognising when even the combined data falls short

Key data sufficiency concepts for beginners

  • The goal is to determine whether the statements fix a single answer, which can still need some working
  • Sufficient means the data leads to one definite answer, not just a possible one
  • Each statement is judged without borrowing facts from the other
  • Combining the statements is checked only after each fails alone

Revision tips to build the basics

  • Write down what the question asks before reading the statements
  • Note the facts each statement gives in a few words or a quick sketch
  • Compare your reasoning with the worked solution, even when your choice was right

Who should take this Level 1 set

It suits reasoning aspirants at the basics stage who need a firm grip on the data sufficiency format before moving to tougher sets.

FAQs about Data Sufficiency Practice Questions with Detailed Solutions – Level 1

What is data sufficiency in reasoning?
Data sufficiency is a question type where a question is followed by statements. You decide whether the information in those statements is enough to answer the question.
What are the options in data sufficiency questions?
Common options are that statement I alone is sufficient, statement II alone is sufficient, either statement alone is sufficient, both together are needed, or even both together are not sufficient. The exact wording can vary between papers, so read the options given.
How do you solve data sufficiency questions?
Check statement I alone, then statement II alone, and combine them only if neither works by itself. At each step, ask whether the data fixes one definite answer.
Do you need to find the actual answer in data sufficiency?
You only need to know whether a unique answer can be determined. Some working may still be needed to confirm that, but the final value does not have to be reported.

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 15050 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.

Recommended courses for CAT & OMET

All CAT & OMET courses
Chat with an academic counsellor on WhatsApp