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
71
13 men can complete a job in 33 days working 7 hours per day. How many days will 18 men take if they work 5 hours per day?
Answer:
33.37
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 13 * 33 * 7 = 3003. 3. New daily work = 18 * 5. 4. New days = 3003 / (18 * 5) = 33.37.
72
13 men can complete a job in 37 days working 7 hours per day. How many days will 18 men take if they work 5 hours per day?
Answer:
37.41
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 13 * 37 * 7 = 3367. 3. New daily work = 18 * 5. 4. New days = 3367 / (18 * 5) = 37.41.
73
10 men can complete a job in 39 days working 6 hours per day. How many days will 15 men take if they work 4 hours per day?
Answer:
39.0
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 10 * 39 * 6 = 2340. 3. New daily work = 15 * 4. 4. New days = 2340 / (15 * 4) = 39.0.
74
11 men can complete a job in 33 days working 9 hours per day. How many days will 16 men take if they work 7 hours per day?
Answer:
29.17
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 11 * 33 * 9 = 3267. 3. New daily work = 16 * 7. 4. New days = 3267 / (16 * 7) = 29.17.
75
13 men can complete a job in 31 days working 9 hours per day. How many days will 18 men take if they work 7 hours per day?
Answer:
28.79
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 13 * 31 * 9 = 3627. 3. New daily work = 18 * 7. 4. New days = 3627 / (18 * 7) = 28.79.
76
11 men can complete a job in 17 days working 9 hours per day. How many days will 16 men take if they work 7 hours per day?
Answer:
15.03
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 11 * 17 * 9 = 1683. 3. New daily work = 16 * 7. 4. New days = 1683 / (16 * 7) = 15.03.
77
12 men can complete a job in 15 days working 8 hours per day. How many days will 17 men take if they work 6 hours per day?
Answer:
14.12
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 12 * 15 * 8 = 1440. 3. New daily work = 17 * 6. 4. New days = 1440 / (17 * 6) = 14.12.
78
11 men can complete a job in 43 days working 7 hours per day. How many days will 16 men take if they work 5 hours per day?
Answer:
41.39
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 11 * 43 * 7 = 3311. 3. New daily work = 16 * 5. 4. New days = 3311 / (16 * 5) = 41.39.
79
11 men can complete a job in 37 days working 9 hours per day. How many days will 16 men take if they work 7 hours per day?
Answer:
32.71
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 11 * 37 * 9 = 3663. 3. New daily work = 16 * 7. 4. New days = 3663 / (16 * 7) = 32.71.
80
12 men can complete a job in 25 days working 6 hours per day. How many days will 17 men take if they work 4 hours per day?
Answer:
26.47
Step-by-step solution: 1. Total work is proportional to men * days * hours. 2. Initial work units = 12 * 25 * 6 = 1800. 3. New daily work = 17 * 4. 4. New days = 1800 / (17 * 4) = 26.47.