Reasoning Ability

If X is father of Y, and Y is brother of Z, then Z must be a child of X. Since Y is Z's brother, Z shares the same parents as Y. Therefore, X is the father of Z.

D is between A and E means either A-D-E or E-D-A. B is between E and C means E-B-C. Combining: A-D-E-B-C satisfies both conditions.

Pattern: (1×2)+1=3, (3×2)+1=7, (7×2)+1=15, (15×2)+1=31, (31×2)+1=63. The next term is 63.

From 'All doctors are professionals' and 'Some professionals are ethical', we cannot definitively conclude anything about the relationship between doctors and ethical people, as the 'some professionals' may or may not include doctors.

If all animals are living things and some cats are animals, then logically some cats must be living things. This is a valid syllogistic conclusion

In a circle of 4: Aman opposite Charu. Bina right of Aman. Then Deepak must be left of Aman (or equivalently, between Aman and Charu on left side)

Pattern: ×2+1: 5×2+1=11, 11×2+1=23, 23×2+1=47, 47×2+1=95, 95×2+1=191

Order: P < Q < R, and T < U. With S between them: P-Q-R-S-T-U. S is at position 4 in a 6-box arrangement, making it central

North + 90° clockwise = East. East + 180° counterclockwise = West. Wait: East - 180° = West. Recalculate: Start North, turn 90° CW = East, turn 180° CCW = West. Answer should be C (East) or D (West). Correct: East (90° CW) then West (180° back) = North facing. Answer is A

Doctors are professionals, but only some professionals are engineers. We cannot conclude anything definite about doctors being engineers