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
41
12 men can complete a job in 21 days working 6 hours per day. How many days will 17 men take if they work 4 hours per day?
Answer:
22.24
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 12 * 21 * 6 = 1512. 3. New daily work = 17 * 4. 4. New days = 1512 / (17 * 4) = 22.24.
42
13 men can complete a job in 35 days working 9 hours per day. How many days will 18 men take if they work 7 hours per day?
Answer:
32.5
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 13 * 35 * 9 = 4095. 3. New daily work = 18 * 7. 4. New days = 4095 / (18 * 7) = 32.5.
43
13 men can complete a job in 25 days working 7 hours per day. How many days will 18 men take if they work 5 hours per day?
Answer:
25.28
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 13 * 25 * 7 = 2275. 3. New daily work = 18 * 5. 4. New days = 2275 / (18 * 5) = 25.28.
44
10 men can complete a job in 17 days working 8 hours per day. How many days will 15 men take if they work 6 hours per day?
Answer:
15.11
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 10 * 17 * 8 = 1360. 3. New daily work = 15 * 6. 4. New days = 1360 / (15 * 6) = 15.11.
45
15 men can complete a job in 41 days working 9 hours per day. How many days will 20 men take if they work 7 hours per day?
Answer:
39.54
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 15 * 41 * 9 = 5535. 3. New daily work = 20 * 7. 4. New days = 5535 / (20 * 7) = 39.54.
46
10 men can complete a job in 45 days working 8 hours per day. How many days will 15 men take if they work 6 hours per day?
Answer:
40.0
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 10 * 45 * 8 = 3600. 3. New daily work = 15 * 6. 4. New days = 3600 / (15 * 6) = 40.0.
47
12 men can complete a job in 31 days working 8 hours per day. How many days will 17 men take if they work 6 hours per day?
Answer:
29.18
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 12 * 31 * 8 = 2976. 3. New daily work = 17 * 6. 4. New days = 2976 / (17 * 6) = 29.18.
48
13 men can complete a job in 43 days working 9 hours per day. How many days will 18 men take if they work 7 hours per day?
Answer:
39.93
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 13 * 43 * 9 = 5031. 3. New daily work = 18 * 7. 4. New days = 5031 / (18 * 7) = 39.93.
49
12 men can complete a job in 47 days working 8 hours per day. How many days will 17 men take if they work 6 hours per day?
Answer:
44.24
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 12 * 47 * 8 = 4512. 3. New daily work = 17 * 6. 4. New days = 4512 / (17 * 6) = 44.24.
50
14 men can complete a job in 17 days working 8 hours per day. How many days will 19 men take if they work 6 hours per day?
Answer:
16.7
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 14 * 17 * 8 = 1904. 3. New daily work = 19 * 6. 4. New days = 1904 / (19 * 6) = 16.7.