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
81
15 men can complete a job in 27 days working 7 hours per day. How many days will 20 men take if they work 5 hours per day?
Answer:
28.35
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 15 * 27 * 7 = 2835. 3. New daily work = 20 * 5. 4. New days = 2835 / (20 * 5) = 28.35.
82
15 men can complete a job in 45 days working 9 hours per day. How many days will 20 men take if they work 7 hours per day?
Answer:
43.39
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 15 * 45 * 9 = 6075. 3. New daily work = 20 * 7. 4. New days = 6075 / (20 * 7) = 43.39.
83
15 men can complete a job in 15 days working 7 hours per day. How many days will 20 men take if they work 5 hours per day?
Answer:
15.75
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 15 * 15 * 7 = 1575. 3. New daily work = 20 * 5. 4. New days = 1575 / (20 * 5) = 15.75.
84
10 men can complete a job in 31 days working 6 hours per day. How many days will 15 men take if they work 4 hours per day?
Answer:
31.0
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 10 * 31 * 6 = 1860. 3. New daily work = 15 * 4. 4. New days = 1860 / (15 * 4) = 31.0.
85
14 men can complete a job in 23 days working 6 hours per day. How many days will 19 men take if they work 4 hours per day?
Answer:
25.42
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 14 * 23 * 6 = 1932. 3. New daily work = 19 * 4. 4. New days = 1932 / (19 * 4) = 25.42.
86
12 men can complete a job in 43 days working 8 hours per day. How many days will 17 men take if they work 6 hours per day?
Answer:
40.47
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 12 * 43 * 8 = 4128. 3. New daily work = 17 * 6. 4. New days = 4128 / (17 * 6) = 40.47.
87
14 men can complete a job in 25 days working 8 hours per day. How many days will 19 men take if they work 6 hours per day?
Answer:
24.56
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 14 * 25 * 8 = 2800. 3. New daily work = 19 * 6. 4. New days = 2800 / (19 * 6) = 24.56.
88
11 men can complete a job in 45 days working 9 hours per day. How many days will 16 men take if they work 7 hours per day?
Answer:
39.78
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 11 * 45 * 9 = 4455. 3. New daily work = 16 * 7. 4. New days = 4455 / (16 * 7) = 39.78.
89
13 men can complete a job in 45 days working 7 hours per day. How many days will 18 men take if they work 5 hours per day?
Answer:
45.5
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 13 * 45 * 7 = 4095. 3. New daily work = 18 * 5. 4. New days = 4095 / (18 * 5) = 45.5.
90
12 men can complete a job in 27 days working 8 hours per day. How many days will 17 men take if they work 6 hours per day?
Answer:
25.41
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 12 * 27 * 8 = 2592. 3. New daily work = 17 * 6. 4. New days = 2592 / (17 * 6) = 25.41.