Data Sufficiency Questions and Answers

Answer: C

'59' means 'injurious habit' and '157' means 'stop bad habit' (from 1). Thus, the common code number '5' stands for common word 'habit'. So, '9' represents 'injurious'. Hence, 1 is sufficient.

Also, '59' means 'injurious habit' and '839' means 'smoking is injurious'. Thus, the common code number '9' stands for common word 'injurious'. So, '5' represents 'habit'. Thus, 2 is also sufficient.

Answer: D

Correct answer: Neither 1 or 2 is sufficient

Statement 1 says he missed the 10.25 and that trains run every five minutes; statement 2 says he did not take the 10.40 or any later one. Together those leave the 10.30 and the 10.35, and nothing distinguishes between them. The two statements narrow the answer to two possibilities, which is not an answer.

Answer: D

Correct answer: Both 1 and 2 are sufficient

Statement 2 says a bus left fifteen minutes ago, that is at 7.45. Statement 1 gives a thirty minute interval, so the next leaves at 8.15. Statement 1 alone gives the interval without a reference departure, and statement 2 alone gives a departure without the interval, so both are needed.

Answer: C

From 1, we conclude that in a class of 47 students, Gaurav ranks 18th from the top and hence 30th from the last.

From 2, we conclude that there are 9 students above and 37 students below Jatin in rank. Thus, there are (9 + 1 + 37) = 47 students in the class.

So, Gaurav who ranks 18th from the top, is 30th from the last.

Answer: D

Correct answer: Neither 1 nor 2 is sufficient

Statement 1 establishes that H is M’s only daughter, which leaves the number of sons entirely open. Statement 2 concerns M’s own brothers and says nothing about M’s children at all. Together they still give no count of the sons, so the question cannot be answered from either statement or from both.

Answer: D

Correct answer: Both 1 and 2 are sufficient

Statement 2 gives the rule - thirty years of service and age sixty - and says Ritesh is three years short of sixty, so he reaches it three years from the date of the statement. Statement 1 shows the service condition was met in April 2000. Only with both can the January 2006 date be tested against the rule, and neither alone contains both halves of it.

Answer: D

Correct answer: Neither 1 or 2 is sufficient

Statement 2 gives the scheduled time and statement 1 says the train normally leaves on time - but “normally” is not “always”, and neither statement says what happened today. The actual departure time therefore remains unknown even with both.

Answer: D

From 2, we know that N is K's son and K is B's grandfather. Thus, N is the son of B's grandfather i.e. N is either father or uncle of B.

From 1, B is the daughter of M. So, M is either father or mother of B.

Clearly, the correct relationship between M and N cannot be deduced.

Answer: D

Correct answer: Neither 1 nor 2 is sufficient

The two statements share only the word ‘clear’, and comparing them shows ‘de’ must be its code. That leaves ‘ra’ and ‘fa’ standing for ‘sky’ and ‘is’ in some order, with nothing to distinguish them. A third statement containing one of those two words but not the other would be needed.

Answer: D

Correct answer: Both 1 and 2 are sufficient

Statement 1 gives Anita before Monika before Tanvy; statement 2 gives Tanvy before Ratna before Sonal. Joined at Tanvy they yield the full order Anita, Monika, Tanvy, Ratna, Sonal, so Sonal came last. Each statement alone covers only three of the five and cannot identify the last.