# 8datasufficiency

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Published on March 19, 2014

Author: SaurabhTrivedi3

Source: slideshare.net

## Description

This presentation is aimed to help aspirants and also faculties for various competitive exams.

CHAPTER 8 DATA SUFFICIENCY Reasoning

This topic covers most of the topics of reasoning i.e. alphabetical series, coding and decoding, blood relation, direction, ranking etc. In data sufficiency we don’t have to find the answer rather we have to analyze the given data and decide whether the given data is sufficient to find an answer or not.

(1) If statement I alone is sufficient but statement II alone is not sufficient. (2) If statement II alone is sufficient but statement I alone is not sufficient. (3) If each statement alone (either I or II) is sufficient. (4) If statement I and II together are not sufficient. (5) If both statement together are sufficient, but neither statement alone is sufficient.

Q.1. Who scored highest among P, Q, R, S and T ? (I) Q scored more than S, but not as much as R. (II) T scored more than R, but not more than P. Explanation: According to question- (I) R>Q>S, (II) P>T>R So, P>T>R>Q>S P scored the highest. So, both statements are needed to arrive at answer. Ans.(5)

Q.2. Five friends P, Q, R, S and T are standing in a row facing East. Who is standing at extreme left end ? (1) R is between T and Q (2) Only P is between S and T. R is immediately right of T. Explanation: According to question : S is extreme left end. S P So, both statements are needed to T arrive at answer. R Ans.(5) Q

Q.3. Mahima's flat is on which floor of the five floor apartment ? (I) Her flat is exactly above Gita's flat whose flat is exactly above Nitin's first floor. (II) Jayash's flat, which is adjacent to Mahima's flat exactly below Ahmed's flat who is on second floor. Explanation: (I) Mahima 3 floor, Gita 2 floor, Nitin - 1 floor (II) Jayesh 4 floor, Mahima 3 floor, Ahmed 2 floor So, the ans.(3)

Q.4. Who among A, B, C, D and E read the book at last ? (I) F, who gave the book to B after reading, was third to read to same. (II) C, who read the book after A, but before D and it is the persons it is the third person to read B is not the first person. Explanation: According to the question : (I) _ _ F B _ (II) _ A C D B Ans.(2) Only IInd statement is sufficient.

Q.5. How is Sarita related to Nirmala ? (I) Sarita's Husband is the only son of Nirmala's mother (II) Sarita’s brother and husband are cousin. Explanation: So, only I statement is sufficient to give the answer but II statement is not sufficient. Ans.(1) HS N

Practice Questions

Q.1. Six people - S, T, U, V, W and X are sitting around a circular table facing the centre. What is T's position with respect to X ? I. Only two people sit between U and W. X is second to the left of W. V and T are immediate neighbours of each other. II. T is to the immediate right of V. There are only two people between T and S. X is an immediate neighbour of S but not of V.

Q.2. Seventeen people are standing in a straight line facing south. What is Bhavna's position from the left end of the line ? I. Sandeep is standing second to the left of Sheetal. Only five people stand between Sheetal and the one who is standing at the extreme right end of the line. Four people stand between Sandeep and Bhavna. II. Anita is standing fourth to the left of Sheetal. Less than three people are standing between Bhavna and Anita.

Q.3. Five letters -A, E, G, N and R are arranged left to right according to certain conditions. Which letter is placed third ? I. G is placed second to the right of A. E is to the immediate right of G. There are only two letters between R and G. II. N is exactly between A and G. Neither A nor G is at the extreme end of the arrangement.

Q.1. Among six people P, Q, R, S, T and V each lives on a different floor of a six storey building having six floors numbered one to six (the ground floor is numbered 1, the floor above it, number 2 and so on and the topmost floor is numbered 6). Who lives on the topmost floor ? (I) There is only one floor between the floors on which R and Q live. P lives on an even numbered floor. (II) T does not live on an even numbered floor. Q lives on an even numbered floor. Q does not live on the topmost floor. (III) S lives on an odd numbered floor. There are two floors between the floors on which S and P live. T lives on a floor immediately above R's floor.

Q.2. There are six letters W, A, R, S, N and E. Is 'ANSWER' the word formed after performing the following operations using these six letters only ? (I) E is placed fourth to the right of A. S is not placed immediately next to either A or E. (II) R is placed immediately next (either left or right) to E. W is place immediately next (either left or right) to S. (III) Both N and W are placed immediately next to S. The word does not begin with R. A is not placed immediately next to W.

Q.3. Point D is in which direction with respect to Point B ? (I) Point A is to the west of Point B. Point C is to the north of Point B. Point D is to the south of Point C. (II) Point G is to the south of Point D. Point G is 4m from Point B. Point D is 9m from Point B. (III) Point A is to the west of Point B. Point B is exactly midway between Point A and E. Point F is to the south of Point E. Point D is to the west of Point F.

Q.4. How is 'One' coded in the code language ? (I) 'one of its kind' is coded as 'zo pi ko fe' and 'in kind and cash' is coded as 'ga to ru ko' (II) 'its point for origin' is coded as 'ba le fe mi' and 'make a point clear' is coded as 'yu si mi de' (III) 'make money and cash' is coded as 'to mi ru hy' and 'money of various kind' is coded as 'qu ko zo hy'.

Q.5. Are all the four friends viz. A, B, C and D who are sitting around a circular table, facing the centre ? (I) B sits second to right of D. D faces the centre. C sits to immediate right of both B and D. (II) A sits to immediate left of B. C is not an immediate neighbour of A. C sits to immediate right of D. (III) D is an immediate neighbour of both A and C. B sits to the immediate left of A. C sits to the immediate right of B.

Q.1-5.Each of the questions below consists of a question and three statements numbered I, II and III given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. CWE PO 18-09-2011

Q.1. How many daughters does W have ? I. B and D are sisters of M. II. M’s father T is husband of W. III. Out of the three children which T has, only one is a boy. (1) Only I and III (2) Only II & III (3) All I, II and III are required to answer the question. (4) Question cannot be answered even with all I, II and III (5) Only I and II

Q.2. Who among A. B, C, D, E and F each having a different height, is the tallest? I. B is taller than A but shorter than E. II. Only two of them are shorter than C. III. D is taller than only F. (1) Only I and II (2) Only I and III (3) Only II & III (4) All I, II and are required to answer the question (5) All I, II and III are not sufficient to answer the question.

Q.3. How is ‘go’ written in a code language ? I. ‘now or never again’ is written as ‘tom ka na sa’ in that code language. II. ‘you come again now’ is written as ‘ja ka ta sa’ in that code language III. ‘again go now or never’ is written as ‘na ho ka sa tom’ in that code language (1) Only I and III (2) Only II and III (3) Only I & II (4) All I, II and III are required to answer the question (5) None of these

Q.4. Towards which direction is village J from village W ? I. Village R is to the west of Village W and to the north of Village T. II. Village Z is to the east of Village J and to the south of Village T. III. Village M is to the north east of Village J and north of Village Z. (1) Only III (2) Only II and III (3) All I, II and III are required to answer the question (4) Question cannot be answered even with all I, II and III (5) None of these

Q.5. On which day of the week starting from Monday did Suresh visit Chennai ? I. Suresh look leave on Wednesday. II. Suresh visited Chennai the day after his mother’s visit to his house. III. Suresh’s mother visited Suresh’s house neither on Monday nor on Thursday. (1) Only II and III (2) Only I and II (3) Only I & III (4) All I, II and III are required to answer the question (5) Question cannot be answered even with all I, II and III.

Q.1. In a six storey building (consisting of floors numbered 1,2,3,4,5 and 6. The ground floor is numbered 1, the floor above it is numbered 2 and so on) the third floor is unoccupied. The building houses different people viz. P, Q, R, S and T, each living on a different floor. On which of the floors does T live ? I. S lives between the floors on which R and T live. II. There are two floors between T’s floor and Q’s floor.

Q.2. How is ‘see’ written in the code language ? I. ‘hope to see you’ is written as ‘ 3692’, ‘do you see that’ is written as ‘1973’. II. ‘to pray and hope’ is written as ‘0286’ and ‘hope I do well’ is written as ‘5467’.

Q.3. Among five friends A, B, C, D and E sitting around a circular table and facing the centre, who is sitting to the immediate left of A ? I. A sits third to the right of B. D is not an immediate neighbour of B. II. B is an immediate neighbour of C.

Q.4. Is X the wife of Y? I. X’s daughter M is the only sister of R. R is the son of Y. II. The mother of Y has only one grandson R.

Q.5. Among P, Q, R, S and T, which bag is the lightest ? I. P is heavier than Q. R is as heavy as Q. T is lighter than R. II. S is lighter than Q but heavier than T.

Q.1. Who amongst Shreya, Jyoti, Leena, Pia and Kajal is the shortest ? I. Leena is taller than Pia and Pia is taller only than Shreya. II. Kajal is taller than Jyoti and Leena. Leena is taller than Pia. Shreya is not the tallest.

Q.2. Is S the mother of M ? I. M is sister of Q, Q is sister of R and R is daughter of S. II. M is daughter of L and L is sister of V.

Q.3. Are all the five friends viz. A, B, C, D and E who are seated around a circular table facing the centre ? I. A sits third to the right of D. D faces the centre. B sits second to the right of A. II. C sits second to the left of E. E faces the centre. D sits second to the right of C.

Q.4. How is ‘came’ written in the code language ? I. ‘we came by car’ is written as ‘4 9 2 8’ and ‘can we buy car’ is written as ‘5 8 0 2’. II. ‘can car be cheap is written as ‘8 1 5 3’ and ‘came by cheap car’ is written as ‘9 8 4 1’.

Q.5.Point A is towards which direction from point B ? I. If a person walks 5 m towards West from point A, takes a left turn and walk 5 m again, he would be 4 m away from point B. II. Point A is towards the North of point C, point C is towards the East of point D and point B is towards the East of point D.

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