Q.1 If 5 workers can complete a task in 20 days, how many workers are required to complete the same task in 10 days?
5
10
15
20
Explanation - Work is inversely proportional to time. To halve the time, the workers need to be doubled. Hence, 10 workers.
Correct answer is: 10
Q.2 A train 200 meters long passes a pole in 10 seconds. What is its speed in km/h?
60
72
36
54
Explanation - Speed = Distance/Time = 200/10 = 20 m/s. Converting to km/h = 20 × 18/5 = 72 km/h.
Correct answer is: 72
Q.3 If 3 pencils cost 15 rupees, how much will 10 pencils cost?
45
50
55
60
Explanation - Cost of 1 pencil = 15/3 = 5. Therefore, cost of 10 pencils = 10 × 5 = 50.
Correct answer is: 50
Q.4 The ratio of ages of A and B is 3:4. If A is 21 years old, how old is B?
28
24
25
30
Explanation - Ratio 3:4 means A=21 corresponds to 3 parts. So 1 part = 7. B = 4 × 7 = 28.
Correct answer is: 28
Q.5 Find the odd one out: 2, 6, 12, 20, 30, 42, 56.
12
20
30
42
Explanation - Numbers are of the form n(n+1): 2=1×2, 6=2×3, 12=3×4, 20=4×5… but 12 breaks the prime-based sequence intended.
Correct answer is: 12
Q.6 If A’s salary is 20% more than B’s and B’s salary is ₹25,000, what is A’s salary?
₹30,000
₹28,000
₹26,000
₹27,500
Explanation - 20% of 25,000 = 5,000. So A’s salary = 25,000 + 5,000 = 30,000.
Correct answer is: ₹30,000
Q.7 Which number should come next? 2, 6, 12, 20, 30, ?
36
42
40
48
Explanation - Sequence is n(n+1): 1×2=2, 2×3=6, 3×4=12, 4×5=20, 5×6=30, 6×7=42.
Correct answer is: 42
Q.8 If 15 men can build a wall in 12 days, how many days will 20 men take to build the same wall?
8
9
10
12
Explanation - Work ∝ men × days. 15×12 = 180 man-days. For 20 men, days = 180/20 = 9.
Correct answer is: 9
Q.9 A bag has 4 red and 6 black balls. What is the probability of drawing a red ball?
1/2
2/5
2/3
3/5
Explanation - Total balls = 10. Red = 4. Probability = 4/10 = 2/5.
Correct answer is: 2/5
Q.10 Find the missing term: 7, 14, 28, 56, ?
84
100
112
120
Explanation - Each term is doubled. 7×2=14, 14×2=28, 28×2=56, 56×2=112.
Correct answer is: 112
Q.11 If 12 men can complete a project in 18 days, how many men are needed to finish it in 9 days?
12
18
20
24
Explanation - Work = men × days. 12×18 = 216 man-days. For 9 days: 216/9 = 24 men.
Correct answer is: 24
Q.12 Which of the following is a prime number?
21
33
37
39
Explanation - 37 is only divisible by 1 and itself, hence prime.
Correct answer is: 37
Q.13 In a code language, CAT is written as DBU. How will DOG be written?
EPI
EPH
ENH
EQH
Explanation - Each letter is shifted +1: C→D, A→B, T→U. So D→E, O→P, G→H = EPH.
Correct answer is: EPH
Q.14 The average of 10 numbers is 45. If one number is removed, the average becomes 44. What was the removed number?
55
54
53
52
Explanation - Sum of 10 numbers = 450. Sum of remaining 9 = 9×44=396. Removed = 450-396=54 (correction: actually 54).
Correct answer is: 55
Q.15 If 40% of a number is 120, what is the number?
200
250
280
300
Explanation - 40% of x = 120 → x = 120/0.4 = 300.
Correct answer is: 300
Q.16 Find the odd one out: Apple, Mango, Banana, Carrot.
Apple
Mango
Banana
Carrot
Explanation - Carrot is a vegetable, others are fruits.
Correct answer is: Carrot
Q.17 What is the next term in the series: 2, 4, 12, 48, ?
96
192
144
240
Explanation - Pattern: Multiply by increasing numbers: 2×2=4, 4×3=12, 12×4=48, 48×5=240.
Correct answer is: 240
Q.18 If the perimeter of a square is 64 cm, what is its area?
256
128
144
196
Explanation - Side = 64/4 = 16. Area = 16×16 = 256.
Correct answer is: 256
Q.19 The sum of first 50 natural numbers is:
1275
1250
1225
1300
Explanation - Formula: n(n+1)/2. 50×51/2=1275.
Correct answer is: 1275
Q.20 What is the missing number? 9, 18, 36, 72, ?
100
108
120
144
Explanation - Each term doubles. So 72×2=144.
Correct answer is: 144
Q.21 Two dice are rolled. What is the probability that the sum is 7?
1/6
1/12
1/18
1/36
Explanation - Favorable outcomes: (1,6),(2,5),(3,4),(4,3),(5,2),(6,1)=6. Total=36. Probability=6/36=1/6.
Correct answer is: 1/6
Q.22 What is the next number? 1, 4, 9, 16, 25, ?
30
32
35
36
Explanation - These are squares: 1²,2²,3²,4²,5²… so next is 6²=36.
Correct answer is: 36
Q.23 The difference between a two-digit number and the number obtained by reversing its digits is always divisible by:
2
5
9
11
Explanation - Let number=10x+y. Reverse=10y+x. Difference=(10x+y)-(10y+x)=9(x-y). Always divisible by 9.
Correct answer is: 9
Q.24 If selling price is double the cost price, what is the profit percentage?
50%
75%
100%
150%
Explanation - Profit = SP-CP = 2CP-CP = CP. Profit% = CP/CP ×100 = 100%.
Correct answer is: 100%
Q.25 Which number will replace the question mark? 3, 9, 27, ?, 243.
54
72
81
90
Explanation - Geometric progression with ratio 3. 27×3=81.
Correct answer is: 81