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
191
Half of 1 percent written as a decimal is:
Answer:
0.005
One percent is 1% or 0.01. Half of 1 percent is 0.5% = 0.5 / 100 = 0.005.
192
Express 125% as a fraction in its simplest form.
Answer:
5/4
To convert a percentage to a fraction, divide by 100. 125% = 125 / 100. Simplifying by dividing the numerator and denominator by 25 gives 5/4.
193
What percent of 2 hours is 30 minutes?
Answer:
25%
First, convert both to the same unit. 2 hours = 120 minutes. Now find what percent 30 is of 120: (30 / 120) * 100 = (1 / 4) * 100 = 25%.
194
What is 12.5% of 800?
Answer:
100
12.5% can be expressed as the fraction 1/8. Multiplying 800 by 1/8 gives 100.
195
What is 15% of 150?
Answer:
22.5
To find 15% of 150, multiply 150 by 0.15. 150 * 0.15 = 22.5.
196
If 30% of a number is 120, what is the number?
Answer:
400
Let the number be x. 30% of x = 120. So, (30/100) * x = 120. Solving for x gives x = (120 * 100) / 30 = 400.
197
Express 0.08 as a percentage.
Answer:
8%
To convert a decimal to a percentage, multiply the decimal by 100. 0.08 * 100 = 8%.
198
Express 4/5 as a percentage.
Answer:
80%
To convert a fraction to a percentage, multiply it by 100. (4 / 5) * 100 = 4 * 20 = 80%.
199
What percent of 50 is 20?
Answer:
40%
To find what percent one number is of another, use the formula (Part / Whole) * 100. Here, (20 / 50) * 100 = 0.4 * 100 = 40%.
200
What is 25% of 400?
Answer:
100
To find 25% of 400, convert the percentage to a fraction or decimal. 25% is equal to 25/100 or 1/4. Multiplying 1/4 by 400 gives 100.