Data Sufficiency Questions and Answers

Answer: A

Correct answer: 1 alone is sufficient while 2 alone is not sufficient

The chairman visits on every Monday except the third of each month. Statement 1 places the Accounts visit in the second week of September and says Purchase was the visit immediately before, which must therefore have been the Monday of the first week of September. Statement 2 gives only the order of three departments with no dates at all.

Answer: D

From 2, we conclude that in a class of 40, Deepak ranks 23rd from the bottom i.e. 18th from the top.

From 1 and 2, we find that Suman is 3 ranks below 18th rank from the top i.e. she ranks 21st from the top.

From 2 and 3, we find that Suman is 3 ranks above 23rd rank from the bottom

i.e. she ranks 20th from the bottom or 21st from the top.

Answer: B

Correct answer: 2 alone is sufficient while 1 alone is not sufficient

Fresh grass is green, so the question is what green is called in this language. Statement 2 says green is called brown, which answers it directly. Statement 1 renames blue, red and orange but never mentions green, so it leaves the question untouched.

Answer: D

From 1, we conclude that Sunny is facing South, since a person facing South shall face North on turning to his right, twice.

From 2, we know that after walking, Sunny shall face towards left of Dinesh facing South i.e. East and a person walking southwards shall face East on turning to 'his left.

Thus, Sunny is facing South.

Answer: D

From 2, we know that Copal's brother was born in 1982.

From 3, we find that Gopal's brother was 8 years younger to him i.e. Gopal was born in 1974.

From 1, we find that Sanjay is 6 years older than Gopal. Thus, Sanjay was born in 1968.

Answer: D

Correct answer: Both 1 and 2 are sufficient

Statement 2 fixes the mother’s birth year: the brother was born in 1964 and is 35 years younger, so she was born in 1929. Statement 1 then places Rahul 25 years after her, in 1954. Neither works alone - the first gives only a gap with no anchor, and the second says nothing about Rahul - so both are needed.

Answer: D

In 1 and 2, the common codes are 'nip' and 'sre' and the common words are 'is' and 'beautiful' So, 'nip' and 'sre' are the codes for 'is' and 'beautiful'. But, the exact word for 'nip' cannot be found out.

Answer: D

Correct answer: Both 1 and 2 are sufficient

The two statements share only the word ‘is’, and they share only the code ‘ke’, so ‘ke’ must be its code. Either statement alone leaves three words against three codes with no way to pair them, so both are needed - and the common word is what makes the comparison work.

Answer: D

From 1, we have: N > M, N > P, D > N. Thus, we have: D > N > M > P or D>N> P>M.

But, from 2, M earns more than P i.e. D > N > M > P. Also, since P earns less than K and N earns less than only D, so we have: D>N>K>M>P or D>N>M> K > P.

Hence, either K or M earns more than only the least earner i.e. P.

Answer: D

Correct answer: Both 1 and 2 are sufficient

Statement 1 gives 300 pages with 200 read before Sunday, leaving 100. Statement 2 says the last 40 were read on Monday, so 60 were read on Sunday. Statement 1 alone leaves the remaining 100 undivided between Sunday and Monday, and statement 2 alone gives no total, so both are needed.