Mathematics/General Ability MCQs
Topic Notes: Mathematics/General Ability
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
21
A can do a piece of work in 13 days and B in 24 days. In how many days can they complete it together?
Answer:
8.43
Step-by-step solution: 1. A's work rate = 1/13. 2. B's work rate = 1/24. 3. Combined rate = 1/13 + 1/24. 4. Time = 1 / combined rate = 8.43 days.
22
A can do a piece of work in 16 days and B in 24 days. In how many days can they complete it together?
Answer:
9.6
Step-by-step solution: 1. A's work rate = 1/16. 2. B's work rate = 1/24. 3. Combined rate = 1/16 + 1/24. 4. Time = 1 / combined rate = 9.6 days.
23
A can do a piece of work in 17 days and B in 19 days. In how many days can they complete it together?
Answer:
8.97
Step-by-step solution: 1. A's work rate = 1/17. 2. B's work rate = 1/19. 3. Combined rate = 1/17 + 1/19. 4. Time = 1 / combined rate = 8.97 days.
24
A can do a piece of work in 12 days and B in 24 days. In how many days can they complete it together?
Answer:
8.0
Step-by-step solution: 1. A's work rate = 1/12. 2. B's work rate = 1/24. 3. Combined rate = 1/12 + 1/24. 4. Time = 1 / combined rate = 8.0 days.
25
A can do a piece of work in 17 days and B in 23 days. In how many days can they complete it together?
Answer:
9.78
Step-by-step solution: 1. A's work rate = 1/17. 2. B's work rate = 1/23. 3. Combined rate = 1/17 + 1/23. 4. Time = 1 / combined rate = 9.78 days.
26
A can do a piece of work in 12 days and B in 19 days. In how many days can they complete it together?
Answer:
7.35
Step-by-step solution: 1. A's work rate = 1/12. 2. B's work rate = 1/19. 3. Combined rate = 1/12 + 1/19. 4. Time = 1 / combined rate = 7.35 days.
27
A can do a piece of work in 12 days and B in 25 days. In how many days can they complete it together?
Answer:
8.11
Step-by-step solution: 1. A's work rate = 1/12. 2. B's work rate = 1/25. 3. Combined rate = 1/12 + 1/25. 4. Time = 1 / combined rate = 8.11 days.
28
A can do a piece of work in 14 days and B in 18 days. In how many days can they complete it together?
Answer:
7.88
Step-by-step solution: 1. A's work rate = 1/14. 2. B's work rate = 1/18. 3. Combined rate = 1/14 + 1/18. 4. Time = 1 / combined rate = 7.88 days.
29
A can do a piece of work in 15 days and B in 20 days. In how many days can they complete it together?
Answer:
8.57
Step-by-step solution: 1. A's work rate = 1/15. 2. B's work rate = 1/20. 3. Combined rate = 1/15 + 1/20. 4. Time = 1 / combined rate = 8.57 days.
30
A can do a piece of work in 12 days and B in 20 days. In how many days can they complete it together?
Answer:
7.5
Step-by-step solution: 1. A's work rate = 1/12. 2. B's work rate = 1/20. 3. Combined rate = 1/12 + 1/20. 4. Time = 1 / combined rate = 7.5 days.