| 1. | 4 | Here, all except Horse, are wild animals, while Horse can be domesticated. | 
| 2. | 2 | Sol. Here, all except Bat, belong to the class of Aves (birds), while Bat is a mammal. Hence, the answer is 2. | 
| 3. | 3 | Here, all except Brass are metals, while Brass is an alloy, Hence, the answer is 3 | 
| 4. | 1 | Here, all except Apple are flowers, while Apple is a fruit. Hence, the answer is 1. | 
| 5. | 1 | Here, all except November are months having 31 days, while November has 30 days. Hence the answer is 1. | 
| 6. | 4 | In all other pairs, second is the tool used by the first. | 
| 7. | 3 | In all other pairs, second is the working place of the first. | 
| 8. | 2 | In all other pairs second is the young one of the first, while in 2. Second is the female of the first. | 
| 9. | 5 | In all other pairs second is the unit to measure the first. On the other hand, barometer is an instrument. | 
| 10. | 1 | In all other pairs, the two words are antonyms of each other. | 
| 11. | 2 | In all other pairs, first is a product made from the second. | 
| 12. | 4 | In all other pairs, second is prepared by the first. | 
| 13. | 2 | In all other pairs, the two words are antonyms of each other. | 
| 14. | 5 | In all other pairs, first denotes the function performed by the second. | 
| 15. | 4 | In all other pairs, first is used to hold the second. | 
| 16. | 4 | In all other pairs, first is the means of transport on the medium denoted by the second. | 
| 17. | 2 | In all other pairs, second is the place where first works. | 
| 18. | 3 | In all other pares, first is the tool which works over the second. | 
| 19. | 2 | In all other pairs, lack of first causes the second. | 
| 20. | 2 | In all other pairs, second is the form in which the first is preserved. |