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
201
Which of the following is the greatest three-digit number that is divisible by 13? (a) 990 (b) 575 (c) 988 (d) 908
Answer:
988
**Step 1:** Identify the greatest three-digit number. This is 999.
202
If 1 is subtracted from each odd digit and 1 is added to each even digit in the number 92379654, what will be the sum of the digits which are second from the left and third from the right? (a) 6 (b) 8 (c) 10 (d) 5
Answer:
10
**Step 1:** First, transform the entire number according to the rules.
203
What is the smallest five-digit number formed by using the digits 2, 3, 4, 0, 5? (a) 23045 (b) 20435 (c) 02345 (d) 20345
Answer:
20345
**Step 1:** Arrange the given digits in ascending order to start building the smallest number: 0, 2, 3, 4, 5.
204
Find the LCM of 8 and 12.
Answer:
24
Step 1: Prime factorize: 8 = 2^3, 12 = 2^2*3. Step 2: Take highest powers: 2^3*3 = 8*3 = 24. Step 3: Therefore the LCM is 24.
205
Compute: 100% of 64
Answer:
64
Step 1: 100% means the whole amount. Step 2: Therefore 100% of 64 is 64.
206
Simplify: 9^(1/2)
Answer:
3
Step 1: The 1/2 power is the square root. Step 2: sqrt(9) = 3. Step 3: Therefore 9^(1/2) = 3.
207
Compute: 2/3 of 45
Answer:
30
Step 1: Multiply: (2/3)*45 = 2*15 = 30. Step 2: Therefore 2/3 of 45 is 30.
208
Evaluate: 0.6 + 0.15
Answer:
0.75
Step 1: Align decimals: 0.60 + 0.15. Step 2: Add tenths and hundredths: 0.60 + 0.15 = 0.75.
209
Compute: 7^2 - 5^2
Answer:
24
Step 1: 7^2 = 49. Step 2: 5^2 = 25. Step 3: Subtract: 49 - 25 = 24.
210
Which of the following is equal to 2/5?
Answer:
All of the above
Step 1: 2/5 = 0.4 in decimal. Step 2: 0.4 = 0.40 when normalized to two decimal places. Step 3: 0.4 = 40% as a percentage. Step 4: All are equivalent representations.