Directions (Q91): Study the following information carefully and answer the…
2025
Directions (Q91): Study the following information carefully and answer the question given below. Eight persons - A, B, C, D, E, F, G and H - live on eight different floors of a building, where the floors are numbered from 1 to 8 (the bottom-most floor is numbered 1 and the top-most floor is numbered 8). Each of them likes a different subject - Philosophy, Chemistry, Biology, Science, English, Physics, Mathematics and Hindi. Three persons live between H and the one who likes English. At least three persons live below H. As many persons live above the one who likes English as live below the one who likes Science. G likes Physics and lives on the second floor, immediately below E. More than two persons live between D and the one who likes Science. D doesn't like Philosophy and doesn't live on the fourth floor. The one who likes Biology lives two floors above D. Two persons live between the ones who like Biology and Chemistry. The one who likes Chemistry lives immediately below C and immediately above A. A lives above F, who lives three floors below the one who likes Hindi.
Q91. The number of floors above the floor on which A lives is one more than the number of floors below the floor on which the person who likes _________ lives.
- A.
Mathematics
- B.
Chemistry
- C.
English
- D.
Biology
Show answer & explanation
Correct answer: D
Concept
Floor-arrangement puzzles are cracked by first pinning the clues that fix an exact position, then converting every 'between / above / below' statement into a numeric floor-gap equation. 'Three persons live between X and Y' means their floor numbers differ by 4; 'two floors above' means +2; 'as many above one as below another' equates two counts. Solving these equations together forces a single consistent grid, after which any positional question is answered by reading the grid.
Application - building the grid
G likes Physics and is on floor 2, immediately below E, so E is on floor 3. These two are fixed anchors.
Biology is two floors above D, so D can be at most floor 6. 'More than two persons between D and Science' needs a gap of at least 4 floors between D and Science; the only position that leaves room for this gap is D on floor 1, which puts Biology on floor 3 (the floor E occupies).
Two persons live between Biology (floor 3) and Chemistry, so Chemistry is on floor 6 (floor 0 is impossible). Chemistry is immediately below C and immediately above A, which forces A to floor 5 and C to floor 7.
Since 'as many above English as below Science' gives English-floor + Science-floor = 9, and the only floor that keeps every subject on a distinct valid floor is Science on floor 5 (the floor A occupies) with English on floor 4.
'At least three persons below H' allows H on floor 4 or higher, and 'three persons between H and English' fixes their gap at exactly 4 floors. With English now on floor 4, the only consistent choice is H on floor 8.
F is three floors below the Hindi-liker and A lives above F, so F is on floor 4 (English) and Hindi is on floor 7 (C). The remaining person B takes floor 6 (Chemistry), and the leftover subjects fall into place: D-Mathematics (floor 1) and H-Philosophy (floor 8).
Final grid (top to bottom): 8 H-Philosophy, 7 C-Hindi, 6 B-Chemistry, 5 A-Science, 4 F-English, 3 E-Biology, 2 G-Physics, 1 D-Mathematics.
Cross-check - answering the question
A is on floor 5, so the floors above A are floors 6, 7 and 8 - exactly 3 floors. The blank needs a subject for which (floors below it) + 1 equals 3, i.e. a subject with 2 floors below it, which means a subject on floor 3.
The subject on floor 3 is Biology, so Biology completes the statement: floors above A (3) = floors below Biology (2) + 1.