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Reasoning practice

Data Sufficiency Questions with Answers

Judging whether the statements are enough to answer, without wasting time actually answering. This page pools every data sufficiency question on the site (158 of them, from 32 exams, weighted towards Banking, Management, Design, Fashion & Hospitality) so you can drill the topic on its own instead of meeting four of them inside a full paper.

47% of the pool is graded hard on this site’s own scale and 2% easy, which is harder than the average topic in this section.

Questions
158
Practice set
25 in 25 min
Difficulty
3/80/75
Negative marking
None
Start Data Sufficiency practice

Data Sufficiency questions with solutions

6 from the 158-question pool, worked in full.

  1. 1. What is x? I: x is an even number. II: x is greater than 6 but less than 10.

    • A. Both statements together are sufficient ✓
    • B. Statement I alone is sufficient
    • C. Statement II alone is sufficient
    • D. Even together they are insufficient

    Solution. Together the statements identify the only even integer between 6 and 10: x = 8.

  2. 2. Was last month profitable for the company? Statement I: Revenue last month was ₹8 lakh. Statement II: Expenses last month were ₹6 lakh.

    • A. Statement I alone is sufficient, but Statement II alone is not sufficient
    • B. Statement II alone is sufficient, but Statement I alone is not sufficient
    • C. Both statements together are sufficient, but neither alone is sufficient ✓
    • D. Both statements together are not sufficient

    Solution. Neither statement alone reveals whether the company was profitable, but together, revenue (8 lakh) exceeds expenses (6 lakh), confirming a profit.

  3. 3. Question: What is the value of y? Statement I: 3y+2=20. Statement II: y is a positive even integer less than 10. Which statement set is sufficient?

    • A. Statement I alone is sufficient ✓
    • B. Statement II alone is sufficient
    • C. Both statements are required
    • D. Neither is sufficient

    Solution. I gives y=6 uniquely. II allows 2,4,6,8, so II alone is insufficient. Thus I alone is sufficient.

  4. 4. Is x greater than 10? Statement I: x is a two-digit number. Statement II: x = 15.

    • A. Statement I alone is sufficient, but Statement II alone is not sufficient
    • B. Statement II alone is sufficient, but Statement I alone is not sufficient ✓
    • C. Both statements together are sufficient, but neither alone is sufficient
    • D. Neither statement is sufficient, even when combined

    Solution. Statement I alone includes values from 10 to 99, some not greater than 10 (not sufficient). Statement II alone directly gives x = 15, which is greater than 10 (sufficient).

  5. 5. What is the value of x? Statement I: 2x + 5 = 17. Statement II: x is a positive integer.

    • A. Statement II alone is sufficient, but Statement I alone is not sufficient
    • B. Both statements together are sufficient, but neither statement alone is sufficient
    • C. Each statement alone is sufficient
    • D. Statement I alone is sufficient, but Statement II alone is not sufficient ✓

    Solution. Statement I alone gives x = 6, a unique value. Statement II alone only says x is a positive integer, which does not fix a unique value.

  6. 6. Question: What is the value of z? Statement I: 4z+3=27. Statement II: z is a positive even integer less than 12. Which statement set is sufficient?

    • A. Statement II alone is sufficient
    • B. Both statements are required
    • C. Statement I alone is sufficient ✓
    • D. Neither is sufficient

    Solution. I gives z=6 uniquely. II allows 2,4,6,8,10, so II alone is insufficient. Thus I alone is sufficient.

Exams that set Data Sufficiency

9 categories, led by Banking, Management, Design, Fashion & Hospitality.

    Drawn from ATIT, IBPS Clerk, IBPS PO, IBPS RRB Office Assistant, IBPS RRB Officer Scale I, IBPS SO, IBSAT, IPMAT Rohtak, Kerala MCA, LIC AAO, MAH MBA CET, MAH MCA CET, MAT, MICAT, NABARD Grade A, NCHM JEE, NIACL AO, NIFT, RBI Assistant, RBI Grade B, RRB NTPC, SBI Clerk, SBI PO, SEBI Grade A, SIDBI Grade A & B, SLAT, SNAP, SSC CGL, SSC Selection Post, TANCET MBA, UPSC CSE, VITEEE.

    Data Sufficiency: frequently asked questions

    How many data sufficiency questions are there?

    158, from the 32 exams here whose syllabus sets the topic. 2% are graded easy and 47% hard, which makes data sufficiency one of the harder topics in this section, against a 18% average.

    Which exams ask data sufficiency questions?

    32 of the exams on this site, weighted towards Banking (14), Management (7), Design, Fashion & Hospitality (2). Every question in this pool comes from one of their own mock tests, so the list below is the honest answer to whether the topic is worth your time.

    Is data sufficiency hard?

    47% of these 158 questions are graded hard and 2% easy, making it one of the harder topics in this section, against a 18% average.

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