All Categories MCQs
Topic Notes: All Categories
General Description
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
2211
Find the odd man out: 41, 43, 47, 53, 61, 71, 73, 75
Answer:
75
Step 1: Analyze the sequence: 41, 43, 47, 53, 61, 71, 73, 75. Step 2: Look for prime numbers. 41, 43, 47, 53, 61, 71, and 73 are all prime numbers. Step 3: The number 75 is divisible by 3, 5, 15, and 25, making it a composite number. Hence, 75 is the odd man out.
2212
Which number does not belong to the group: 10, 14, 16, 18, 23, 24, 26
Answer:
23
Step 1: Look at the series: 10, 14, 16, 18, 23, 24, 26. Step 2: Check the parity (even/odd) of the numbers. All numbers except one are even numbers. Step 3: The number 23 is an odd number (and also a prime number), making it the odd one out.
2213
Find the odd man out in the series: 13, 17, 19, 21, 23, 29
Answer:
21
Step 1: Examine the numbers: 13, 17, 19, 21, 23, 29. Step 2: Note that 13, 17, 19, 23, and 29 are all prime numbers. Step 3: The number 21 is a composite number (3 x 7). Therefore, 21 is the odd man out.
2214
Identify the odd one out: 8, 12, 16, 21, 24, 28
Answer:
21
Step 1: Analyze the sequence: 8, 12, 16, 21, 24, 28. Step 2: Check for common multiples. The numbers 8, 12, 16, 24, and 28 are all multiples of 4. Step 3: The number 21 is a multiple of 3 and 7, not 4. It is also the only odd number. Thus, 21 is the odd man out.
2215
Find the odd man out: 15, 25, 30, 34, 40, 50
Answer:
34
Step 1: Observe the given series: 15, 25, 30, 34, 40, 50. Step 2: Check for divisibility rules. The numbers 15, 25, 30, 40, and 50 all end in 0 or 5, meaning they are multiples of 5. Step 3: The number 34 is not divisible by 5, making it the odd one out.
2216
Which number is the odd man out: 31, 37, 41, 43, 47, 49
Answer:
49
Step 1: Analyze the series: 31, 37, 41, 43, 47, 49. Step 2: Identify the common trait. The numbers 31, 37, 41, 43, and 47 are consecutive prime numbers. Step 3: The number 49 is a perfect square (7 x 7) and a composite number. Therefore, 49 is the odd man out.
2217
Find the odd number in the series: 17, 19, 23, 27, 29, 31
Answer:
27
Step 1: Examine the numbers: 17, 19, 23, 27, 29, 31. Step 2: Check for prime numbers. 17, 19, 23, 29, and 31 are all prime numbers. Step 3: The number 27 is divisible by 3 and 9, making it a composite number. Hence, 27 is the odd one out.
2218
Identify the odd one out: 12, 14, 15, 18, 20, 22
Answer:
15
Step 1: Look at the sequence of numbers: 12, 14, 15, 18, 20, 22. Step 2: Check for basic properties like even and odd. 12, 14, 18, 20, and 22 are all even numbers (divisible by 2). Step 3: The number 15 is an odd number. Thus, 15 breaks the pattern and is the odd man out.
2219
Find the odd man out in the series: 2, 3, 5, 7, 9, 11
Answer:
9
Step 1: Analyze the numbers given in the series: 2, 3, 5, 7, 9, 11. Step 2: Observe the mathematical properties of the numbers. 2, 3, 5, 7, and 11 are all prime numbers, meaning they are only divisible by 1 and themselves. Step 3: The number 9 is a composite number (divisible by 1, 3, and 9). Therefore, 9 is the odd man out.
2220
How many odd days are generated by exactly 5 ordinary years?
Answer:
5
Every single ordinary year contains precisely 1 odd day. Therefore, 5 ordinary years will naturally generate 5 × 1 = 5 odd days.