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
111
Identify the odd one out in the series: 19, 28, 37, 46, 55, 64, 75
Answer:
75
Step 1: Examine the numbers: 19, 28, 37, 46, 55, 64, 75. Step 2: Check the sum of the digits for each number. The sum is 10 for all except the last one (1+9=10, 2+8=10, etc.). Step 3: For 75, the sum of digits is 7+5=12. Since it is not 10, 75 is the odd one out.
112
Find the odd man out: 18, 27, 36, 45, 54, 63, 73
Answer:
73
Step 1: Analyze the sequence: 18, 27, 36, 45, 54, 63, 73. Step 2: Determine that the sum of the digits is consistently 9 (and they are multiples of 9). Step 3: For 73, the sum of the digits is 7+3=10. Thus, 73 is the odd man out.
113
Which number does not belong to the group: 15, 24, 33, 42, 51, 60, 71
Answer:
71
Step 1: Review the series: 15, 24, 33, 42, 51, 60, 71. Step 2: Evaluate the sum of the digits. 1+5=6, 2+4=6, 3+3=6, 4+2=6, 5+1=6, 6+0=6. Step 3: The sum of the digits for 71 is 7+1=8. The number 71 breaks the pattern.
114
Find the odd man out in the series: 16, 25, 34, 43, 52, 61, 72
Answer:
72
Step 1: Look at the numbers: 16, 25, 34, 43, 52, 61, 72. Step 2: Find the sum of the digits. The sum is 7 for all numbers except the last one (1+6=7, 2+5=7, etc.). Step 3: For 72, the sum of digits is 7+2=9. The number 72 is the odd man out.
115
Identify the odd one out: 17, 26, 35, 44, 53, 62, 70
Answer:
70
Step 1: Analyze the sequence: 17, 26, 35, 44, 53, 62, 70. Step 2: Calculate the sum of the digits. For the first six numbers, the sum is 8 (1+7=8, 2+6=8, etc.). Step 3: The sum of digits for 70 is 7+0=7. Therefore, 70 is the odd man out.
116
Find the odd man out: 13, 22, 31, 40, 58, 112
Answer:
58
Step 1: Observe the given series: 13, 22, 31, 40, 58, 112. Step 2: Add the digits of each number: 1+3=4, 2+2=4, 3+1=4, 4+0=4, 1+1+2=4. Step 3: The sum of digits for 58 is 5+8=13. Hence, 58 is the odd man out.
117
Which number is the odd man out: 14, 23, 32, 41, 50, 68
Answer:
68
Step 1: Analyze the series: 14, 23, 32, 41, 50, 68. Step 2: Check the sum of the digits. 1+4=5, 2+3=5, 3+2=5, 4+1=5, 5+0=5. Step 3: The sum of digits for 68 is 6+8=14. The number 68 does not share the same digit sum property.
118
Find the odd number in the series: 11, 20, 101, 110, 200, 201
Answer:
201
Step 1: Examine the numbers: 11, 20, 101, 110, 200, 201. Step 2: Find the sum of the digits for each number. 1+1=2, 2+0=2, 1+0+1=2, 1+1+0=2, 2+0+0=2. Step 3: For 201, the sum is 2+0+1=3. Therefore, 201 is the odd man out.
119
Identify the odd one out: 12, 21, 30, 48, 56, 102
Answer:
56
Step 1: Look at the sequence: 12, 21, 30, 48, 56, 102. Step 2: Calculate the sum of the digits. 1+2=3, 2+1=3, 3+0=3, 4+8=12 (1+2=3), 1+0+2=3. All reduce to a digit sum of 3. Step 3: For 56, the sum is 5+6=11. Thus, 56 is the odd man out.
120
Find the odd man out: 18, 27, 36, 45, 54, 64
Answer:
64
Step 1: Analyze the series: 18, 27, 36, 45, 54, 64. Step 2: Check the sum of the digits for each number. 1+8=9, 2+7=9, 3+6=9, 4+5=9, 5+4=9. The sum is consistently 9. Step 3: The sum of digits for 64 is 6+4=10. Therefore, 64 is the odd man out.