General Knowledge
Q. If a tank uses 15 liters of fuel to travel 100 km, how much fuel will it need to travel 250 km? (2023)
A.
30 liters
B.
35 liters
C.
40 liters
D.
45 liters
Show solution
Solution
Fuel needed = (Fuel per 100 km) × (Distance / 100) = 15 liters × (250 km / 100) = 37.5 liters, rounded to 40 liters
Correct Answer: C — 40 liters
Learn More →
Q. If a test for a disease has a sensitivity of 90% and a specificity of 95%, what is the probability that a person who tests positive actually has the disease, given that the prevalence is 1%? (2022)
A.
0.018
B.
0.1
C.
0.5
D.
0.9
Show solution
Solution
Using Bayes' theorem, P(Disease | Positive) = (Sensitivity × Prevalence) / ((Sensitivity × Prevalence) + (1 - Specificity) × (1 - Prevalence)) = (0.9 × 0.01) / ((0.9 × 0.01) + (0.05 × 0.99)) = 0.018.
Correct Answer: A — 0.018
Learn More →
Q. If a train travels at a speed of 60 km/h, how far will it travel in 2.5 hours?
A.
120 km
B.
150 km
C.
180 km
D.
200 km
Show solution
Solution
Distance = speed * time = 60 km/h * 2.5 h = 150 km.
Correct Answer: B — 150 km
Learn More →
Q. If a triangle has angles of 30° and 60°, what is the measure of the third angle?
A.
90°
B.
60°
C.
30°
D.
120°
Show solution
Solution
The sum of angles in a triangle is 180°. Therefore, the third angle is 180° - 30° - 60° = 90°.
Correct Answer: A — 90°
Learn More →
Q. If a triangle has sides of lengths 3 cm, 4 cm, and 5 cm, is it a right triangle?
A.
Yes
B.
No
C.
Not enough information
D.
Only if angles are known
Show solution
Solution
Yes, because 3² + 4² = 5² (9 + 16 = 25).
Correct Answer: A — Yes
Learn More →
Q. If a triangle has sides of lengths 3 cm, 4 cm, and 5 cm, what is its area? (2021)
A.
6 cm²
B.
12 cm²
C.
8 cm²
D.
10 cm²
Show solution
Solution
Area = 1/2 × base × height = 1/2 × 3 cm × 4 cm = 6 cm².
Correct Answer: A — 6 cm²
Learn More →
Q. If a vaccine reduces the risk of infection by 75%, what is the probability of infection after vaccination if the initial probability of infection is 0.2? (2020)
A.
0.05
B.
0.1
C.
0.15
D.
0.2
Show solution
Solution
The probability of infection after vaccination = Initial probability × (1 - reduction) = 0.2 × (1 - 0.75) = 0.2 × 0.25 = 0.05.
Correct Answer: B — 0.1
Learn More →
Q. If a wire carries a current of 3 A and has a resistance of 2 ohms, what is the power dissipated in the wire?
A.
6 W
B.
9 W
C.
12 W
D.
15 W
Show solution
Solution
Power is given by P = I^2 * R. Here, P = (3 A)^2 * 2 Ω = 9 * 2 = 18 W.
Correct Answer: C — 12 W
Learn More →
Q. If it is 12:00 noon at the Prime Meridian (0 degrees longitude), what time is it at 45 degrees East longitude? (2020)
A.
6:00 AM
B.
12:00 PM
C.
6:00 PM
D.
3:00 PM
Show solution
Solution
At 45 degrees East, it is 45/15 = 3 hours ahead. Therefore, it is 12:00 PM + 3 hours = 3:00 PM.
Correct Answer: C — 6:00 PM
Learn More →
Q. If it is 12:00 noon at the Prime Meridian (0° longitude), what time is it at 75°W longitude?
A.
6:00 AM
B.
7:00 AM
C.
8:00 AM
D.
9:00 AM
Show solution
Solution
Each degree of longitude represents 4 minutes of time. 75°W = 75 * 4 = 300 minutes = 5 hours. Therefore, it is 12:00 noon - 5 hours = 7:00 AM.
Correct Answer: C — 8:00 AM
Learn More →
Q. If it is 3:00 PM in New Delhi (77°E), what time is it in London (0° longitude)?
A.
8:30 AM
B.
9:30 AM
C.
10:30 AM
D.
11:30 AM
Show solution
Solution
New Delhi is 77°E, which is 77 * 4 = 308 minutes = 5 hours and 8 minutes ahead of GMT. Therefore, 3:00 PM - 5:08 = 9:30 AM.
Correct Answer: B — 9:30 AM
Learn More →
Q. If it is 3:00 PM in New York (GMT-5), what time is it in London (GMT+0)? (2022)
A.
8:00 AM
B.
10:00 AM
C.
12:00 PM
D.
3:00 PM
Show solution
Solution
New York is 5 hours behind London, so 3:00 PM + 5 hours = 8:00 PM in London.
Correct Answer: B — 10:00 AM
Learn More →
Q. If the area of a triangle is 48 cm² and the base is 12 cm, what is the height? (2022)
A.
6 cm
B.
8 cm
C.
4 cm
D.
10 cm
Show solution
Solution
Area = 1/2 * base * height, so 48 = 1/2 * 12 * height, height = 48/(6) = 8 cm.
Correct Answer: B — 8 cm
Learn More →
Q. If the atmospheric pressure is 1013 hPa, what is it in mmHg?
A.
760 mmHg
B.
800 mmHg
C.
850 mmHg
D.
900 mmHg
Show solution
Solution
The atmospheric pressure of 1013 hPa is equivalent to 760 mmHg.
Correct Answer: A — 760 mmHg
Learn More →
Q. If the average incubation period of a disease is 14 days, how many days will it take for 3 incubation periods to pass? (2020)
Show solution
Solution
Total days = 3 × 14 = 42 days.
Correct Answer: B — 42
Learn More →
Q. If the lengths of the sides of a triangle are 7 cm, 24 cm, and 25 cm, is it a right triangle? (2023)
A.
Yes
B.
No
C.
Cannot be determined
D.
Only if angles are known
Show solution
Solution
Using Pythagoras theorem, 7² + 24² = 49 + 576 = 625 = 25², so it is a right triangle.
Correct Answer: A — Yes
Learn More →
Q. If the lengths of two sides of a triangle are 8 cm and 15 cm, what is the maximum possible length of the third side? (2021)
A.
22 cm
B.
23 cm
C.
24 cm
D.
25 cm
Show solution
Solution
The maximum length of the third side is less than the sum of the other two sides, so it can be 22 cm.
Correct Answer: A — 22 cm
Learn More →
Q. If the mortality rate of a disease is 5% and 2000 people are diagnosed, how many deaths are expected? (2023)
A.
50
B.
75
C.
100
D.
125
Show solution
Solution
Expected deaths = 5% of 2000 = 0.05 * 2000 = 100 deaths.
Correct Answer: C — 100
Learn More →
Q. If the Parliament has 790 members and 20% are women, how many women are there in the Parliament?
A.
158
B.
160
C.
150
D.
170
Show solution
Solution
Number of women = 20% of 790 = 0.2 * 790 = 158.
Correct Answer: A — 158
Learn More →
Q. If the Parliament has 790 members and 40% are from the opposition, how many members are from the opposition?
A.
316
B.
320
C.
300
D.
310
Show solution
Solution
Opposition members = 40% of 790 = 0.4 * 790 = 316.
Correct Answer: A — 316
Learn More →
Q. If the Parliament is in session for 120 days in a year and the Lok Sabha meets for 75% of those days, how many days does the Lok Sabha meet?
Show solution
Solution
Days Lok Sabha meets = 75% of 120 = 0.75 * 120 = 90.
Correct Answer: A — 90
Learn More →
Q. If the perimeter of a triangle is 30 cm and the lengths of two sides are 10 cm and 12 cm, what is the length of the third side? (2020)
A.
8 cm
B.
10 cm
C.
12 cm
D.
14 cm
Show solution
Solution
Let the third side be x. Then, 10 + 12 + x = 30, so x = 30 - 22 = 8 cm.
Correct Answer: A — 8 cm
Learn More →
Q. If the pH of a river is measured to be 7.5, what type of water is it considered? (2020)
A.
Acidic
B.
Neutral
C.
Alkaline
D.
Distilled
Show solution
Solution
A pH greater than 7 is considered alkaline.
Correct Answer: C — Alkaline
Learn More →
Q. If the population of a city increases by 10% every year, what will be the population after 2 years if the current population is 1000? (2021)
A.
1210
B.
1100
C.
1020
D.
1200
Show solution
Solution
Population after 1 year = 1000 * 1.10 = 1100. Population after 2 years = 1100 * 1.10 = 1210.
Correct Answer: A — 1210
Learn More →
Q. If the population of a country increases by 5% every year, what will be the population after 2 years if the current population is 100,000?
A.
110,250
B.
105,000
C.
120,000
D.
102,500
Show solution
Solution
Population after 2 years = 100,000 * (1 + 0.05)^2 = 100,000 * 1.1025 = 110,250.
Correct Answer: A — 110,250
Learn More →
Q. If the population of a town increases by 10% every year, what will be the population after 2 years if the current population is 1000? (2021)
A.
1210
B.
1100
C.
1020
D.
1200
Show solution
Solution
Population after 1 year = 1000 * 1.10 = 1100. Population after 2 years = 1100 * 1.10 = 1210.
Correct Answer: A — 1210
Learn More →
Q. If the radius of a circle is 7 units, what is its circumference?
A.
14π units
B.
21π units
C.
28π units
D.
7π units
Show solution
Solution
Circumference = 2 * π * radius = 2 * π * 7 = 14π units.
Correct Answer: A — 14π units
Learn More →
Q. If the Rajya Sabha has 12 nominated members and the total number of members is 245, how many are elected?
A.
233
B.
232
C.
230
D.
240
Show solution
Solution
Elected members = Total members - Nominated members = 245 - 12 = 233.
Correct Answer: A — 233
Learn More →
Q. If the Rajya Sabha has 12 nominated members and the total number of members is 245, what percentage of the Rajya Sabha members are nominated?
A.
4.89%
B.
5.00%
C.
6.12%
D.
7.14%
Show solution
Solution
Percentage of nominated members = (12 / 245) * 100 = 4.89%.
Correct Answer: B — 5.00%
Learn More →
Q. If the relative humidity is 80% and the temperature is 25°C, what is the dew point temperature approximately? (2023)
A.
20°C
B.
22°C
C.
18°C
D.
15°C
Show solution
Solution
Using a dew point calculator or approximation, the dew point at 80% relative humidity and 25°C is approximately 22°C.
Correct Answer: B — 22°C
Learn More →
Showing 151 to 180 of 505 (17 Pages)
