Mathematics — All MCQs
1905 questions available
Q1841.What percent of 4 is 5?
Correct Answer: A
(5 / 4) × 100 = 125%.
Q1842.Aftab leaves his house at 20 minutes to seven in the morning, reaches Gul Khan's house in 15 minutes, and then leaves for the office which takes 35 minutes. At what time does he arrive at the office?
Correct Answer: B
Aftab leaves at 6:40 AM, reaches Gul Khan's house at 6:55 AM. Leaving immediately, he travels 35 minutes to the office, arriving at exactly 7:30 AM.
Q1843.30 labourers working 7 hours a day can finish a work in 18 days. If they work 6 hours a day, how many labourers are needed to finish it in 30 days?
Correct Answer: D
Total man-hours required = 30 x 7 x 18 = 3780. Working 6 hours for 30 days gives 180 hours/man. Required labourers = 3780 / 180 = 21.
Q1844.12 men working 8 hours a day complete a work in 10 days. To complete the same work in 8 days working 15 hours a day, how many men are required?
Correct Answer: B
Total man-hours = 12 x 8 x 10 = 960. For the new schedule: 8 days x 15 hours = 120 hours. Required men = 960 / 120 = 8.
Q1845.Shaista completes a work in 10 days, and Ali completes it in 40 days. If they work together, how many days will they take?
Correct Answer: B
Combined work rate = 1/10 + 1/40 = 5/40 = 1/8. So it will take 8 days to complete working together.
Q1846.If 3 persons do 3 times a work in 3 days, then 7 persons can do 7 times that work in how many days?
Correct Answer: A
Efficacy: 3 persons do 3 jobs in 3 days, meaning 3 persons do 1 job in 1 day, or 1 person does 1 job in 3 days. Thus, 7 persons can do 7 jobs in 3 days.
Q1847.If 4 men can color 48m of cloth in 2 days, how many days will 6 men take to color 36m of cloth?
Correct Answer: B
Rate of coloring = 48 / (4 x 2) = 6 meters per man-day. For 6 men to color 36m: 36 / (6 x 6) = 1 day.
Q1848.Expand the expression: (x + 4)(x - 2)
Correct Answer: B
(x + 4)(x - 2) = x^2 - 2x + 4x - 8 = x^2 + 2x - 8.
Q1849.200% of 800 equals:
Correct Answer: D
200% = 2.0. So, 2 * 800 = 1600.
Q1850.Three people invest 9000, 12000, and 15000. After 6 months, the 3rd person's profit is 1500. What is the profit of the others?
Correct Answer: A
Profit ratio = Investment ratio = 9:12:15 = 3:4:5. If 3rd is 1500, each unit = 300. 1st = 900, 2nd = 1200.
Q1851.What are the roots of the equation: x^2 + x - 2 = 0?
Correct Answer: B
Factorize: (x + 2)(x - 1) = 0. So, roots are x = -2 and x = 1.
Q1852.What is 25% of 60?
Correct Answer: C
25% of 60 = 60 / 4 = 15.
Q1853.Write the base of the exponential term -(-5)^2?
Correct Answer: C
In the term -(-5)^2, the base being raised to the power of 2 is -5.
Q1854.Evaluate: 4 + 4/4 = ?
Correct Answer: D
By BODMAS, division comes first: 4 / 4 = 1. Then addition: 4 + 1 = 5.
Q1855.Simplify: 3*sqrt(27)
Correct Answer: B
3 * sqrt(27) = 3 * sqrt(9 x 3) = 3 * 3 * sqrt(3) = 9*sqrt(3).
Q1856.Simplify the fraction 14/35.
Correct Answer: B
Dividing both numerator and denominator by their GCD of 7 gives 2/5.
Q1857.The sum of two consecutive odd numbers is 16. What are the numbers?
Correct Answer: D
Let the odd numbers be n and n+2. n + n+2 = 16 -> 2n = 14 -> n = 7. The numbers are 7 and 9.
Q1858.If apples cost 15 rupees each, how many apples can you buy with 120 rupees?
Correct Answer: C
Total apples = 120 / 15 = 8.
Q1859.What is 6% of 800?
Correct Answer: D
6% of 800 = (6/100) * 800 = 48.
Q1860.The total score made by 8 players is 192. What is the average score made by one player?
Correct Answer: C
Average score = Total score / Players = 192 / 8 = 24.