[Q.16] Select the word pair that expresses the same relationship as: Clock : Time :: Thermometer : ?
Clock measures time; Thermometer measures temperature.
[Q.17] Statements: Some books are pens. No pen is a pencil. Conclusion I: Some pens are books. Conclusion II: No book is a pencil.
Some books are pens implies Some pens are books (I follows). We cannot definitively conclude that no book is a pencil (II does not necessarily follow).
[Q.18] Choose the number pair that is different from the rest.
For (12,36), (16,64), (18,81), second number is (first/$2)^2$. 12/2=6 -> 36, 16/2=8 -> 64, 18/2=9 -> 81. For 14, (14/$2)^2$ = 49, all match except 14-49 follows the same, let's check: 14/2=7 -> 49. Wait, 14-49 is (14/$2)^2$ = 49. Let's look at prime/even: 12,16,18 are even, all follow (n/$2)^2$.
[Q.19] If 'TIGER' is coded as '2097518', how is 'LION' coded in the same scheme?
Direct positional indices: L=12, I=9, O=15, N=14 -> 1291514.
[Q.20] Introducing a lady, a man said, 'Her mother is the only daughter of my mother-in-law.' How is the man related to the lady?
Only daughter of mother-in-law is his wife. Her mother is his wife, so he is her father.