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B lives in an even numbered flat on lowermost floor i.e. B lives on floor ground floor in flat 2. Z lives in an even numbered flat on floor number 2. B and C live on same floor. P lives immediately above C and the numbers of their flats is same. So, Now, C either lives immediate west or east of B which means P either lives in flat 3 or flat 1. So, we have two possibilities. Case I: When C and P live on flat – 3: Case-2 When C and P live on Flat-1
R and A live on same floor. X lives to the immediate west of R. R lives immediately below the vacant flat and the flat number of vacant flat and R is same. A lives in flat –1. There is one floor between R and Q. Now, R lives immediately below vacant flat so, the vacant flat must be in topmost floor. Case I: When C and P live on flat – 3:
Case II: When C and P live on flat – 1
D lives somewhere above Y in same flat number, but not on flat 3. Now, we cannot fix D and Y in same flat number in case II, so, case II is invalid. The final arrangement is as follows:
152 142 122 ? 52 2
3.6 × 1.5 + 8.4 × 2.5 – 9.2 × 3.5 = ? – 9.2 × 4.4
2.5, 5, 15, 60, ?, 1800, 12600
64, 256, 128, 512, 256, ?
18.003 × 3.99 × (135.003 ÷ 26.97) – (15.001 × 3.94) = ?
76, 80, 89, 105, ?, 166
124, 147, 176, 207, 244, ?
4 9 28 99 ? 2105 12660
...8 13 36 123 ? 2585
12, 11, 20, 57, 224, 1015