Data Sufficiency Reasoning: Solved Examples

Directions for data sufficiency questions (1-10):

Question 1. Who is taller among P, Q, R, S & T?

From I : P is shorter than only T, this means that P is taller than all Q, R & S, so T is tallest.

From II : Q only taller than S, so S is shortest, and Q is second shortest, Now T taller than P and R both, So tallest of all.

 

Question 2. What is the distance between point P and point Q?

From I : No relation between points P and Q

From II : In this since we don’t know the angles between sides of triangle forming with points PQS and PQR, PQ cannot be determined.

Question 3. How is Shubham related to Shivani?

Either statement cant give the answer.

From both statements we can get the relationship as Pooja is Neeraj’s sister but it cannot be clearly said that Shubham & Meenal are Pooja’s children or not & Shivani is Neeraj’s daughter, because there can be other siblings of Neeraj and Pooja also.

Question 4. How is PRODUCT written in that code language?

From I: All vowels are coded as next alphabets

From II: All consonants are coded as previous alphabets

So from both the statements.

Question 5. How is ‘face’ written in that code language?

From I : ‘no one face’ is coded as ‘om fo sop’

From II : ‘no’ is ‘fo’

Now from both – ‘one face’ is ‘om sop’ and now from II: ‘face of no light’ is written as ‘om mot fo kiz’, ‘face’ is ‘om’

Question 6. What is Monica’s position with respect to Rahul?

From I: The position of both of them  in a row can be known, so Monica’s position can be known.

From II: Since the total number of students is not known in this case, Monica’s position with respect to Rahul cannot be known.

Question 7. Who has secured less marks among P, Q, R , S & T ?

From I: S is at 3rd position from top, & R and T at 1st or 2nd.

From II : Q’s marks more than P

From both, order in descending is R/T, T/R, S, Q, P

So P has secured less marks among all.

Question 8. On which floor is Shikha residing?

From I: 6 storey building has 2, 4 and 6 even numbered floors, out of which Rekha is on 4th, so Shruti is on either 2 or 6. Reema is not on 6 (top-most), but since it is not given Reema also stays on an even numbered floor, nothing can be known about Shikha

From II : Peter is 3 floors above Shikha, this means that Shikha will have to be at 1, 2 or 3 floor, so that Peter is at 3 above Shikha’s floor.

From both, Shikha is at 2nd floor.

Question 9 : Amit is facing which direction?

From I: Can't be found from I because no mention of Amit.

From II : Cannot be found because don’t know the direction of either Kiran or Shikha.

From both also we cannot found because we don’t know when Kiran is facing Shikha – when Shikha facing east or when Shikha after turning right faces south.

Question 10: In which month is Meena’s birthday?

Since in each statement we do not know that which month is going on right now, question cannot be answered.