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
121
If 16 monkeys eat 16 bananas in 16 minutes, how many monkeys will eat 48 bananas in 48 minutes?
Answer:
16
(M1 * T1) / W1 = (M2 * T2) / W2. (16 * 16) / 16 = (x * 48) / 48. 16 = x. So, 16 monkeys.
122
If the cost of 18 kg of pulses is Rs. 1440, what is the cost of 22 kg?
Answer:
Rs. 1760
Direct proportion. 18 / 1440 = 22 / x. 1/80 = 22/x. x = 22 * 80 = 1760.
123
If 50 men can dig a well in 20 days, how many days will 40 men take to dig the same well?
Answer:
25
Inverse proportion. M1 * D1 = M2 * D2. 50 * 20 = 40 * x. 1000 = 40x. x = 25 days.
124
If 12 bakers bake 144 cakes in 6 hours, how many cakes will 8 bakers bake in 9 hours?
Answer:
144
(M1 * H1) / W1 = (M2 * H2) / W2. (12 * 6) / 144 = (8 * 9) / x. 72 / 144 = 72 / x. 1/2 = 72/x. x = 144 cakes.
125
If 5 computers download 5 files in 5 seconds, how many seconds will 100 computers take to download 100 files?
Answer:
5 seconds
(M1 * T1) / W1 = (M2 * T2) / W2. (5 * 5) / 5 = (100 * x) / 100. 5 = x. So, 5 seconds.
126
A garrison of 600 men has enough food for 40 days. If 200 men leave, how long will the food last?
Answer:
60 days
Remaining men = 400. M1 * D1 = M2 * D2. 600 * 40 = 400 * x. 24000 = 400x. x = 60 days.
127
If 24 workers can weave 60 rugs in 10 days, how many workers can weave 90 rugs in 12 days?
Answer:
30
(M1 * D1) / W1 = (M2 * D2) / W2. (24 * 10) / 60 = (x * 12) / 90. 240 / 60 = 12x / 90. 4 = 12x / 90. 360 = 12x. x = 30 workers.
128
If a man can type 45 words per minute, he finishes a document in 60 minutes. If he types 54 words per minute, how long will it take?
Answer:
50 mins
Inverse proportion. Speed1 * Time1 = Speed2 * Time2. 45 * 60 = 54 * x. 2700 = 54x. x = 50 mins.
129
If 8 pipes can empty a tank in 40 minutes, how long will 10 pipes take?
Answer:
32 mins
Inverse proportion. 8 * 40 = 10 * x. 320 = 10x. x = 32 mins.
130
If 35 men can repair a road in 12 days, how many men will repair it in 15 days?
Answer:
28
Inverse proportion. 35 * 12 = x * 15. 420 = 15x. x = 28 men.