Two boys walk at 5 km/h and 5.5 km/h. Time difference after same distance is ____. A. 17 hr B. 14 hr C. 12 hr D. 19 hr Explanation: Relative speed difference.
Two automobiles 150 km apart move toward each other. Time to meet is ____. A. 2.5 hr B. 2 hr C. 1.75 hr D. 1.5 hr Explanation: Relative speed method.
12 people draw lots. Probability that one specific host has dinner is ____. A. One B. Zero C. Three D. Cannot be Explanation: Insufficient clarity.
12 children take 16 days to finish work. Time for the same work with a different number is ____. A. 3 days B. 4 days C. 6 days D. 8 days Explanation: Work is inversely proportional.
Total area of 64 squares is 400 cm². Find the side of the big square. A. 17 cm B. 20 cm C. 23 cm D. 26 cm Explanation: Total side calculation.
Khadija’s age after 1 year is twice her age 10 years ago. Find the present age. A. 19 B. 20 C. 21 D. 22 Explanation: Solve Equation.
Same stock problem repeated. Investment needed is ____. A. Rs. 10000 B. Rs. 10800 C. Rs. 14400 D. Rs. 16000 Explanation: Direct calculation.
To get income Rs. 1200 from 12% stock at 90, investment needed is ____. A. Rs. 10800 B. Rs. 10000 C. Rs. 14400 D. Rs. 16000 Explanation: Investment = income ×100/(rate × face value factor).
Pipes P, Q, R fill the tank in 20, 15, 12 minutes. Together fill in ____. A. 5 min B. 10 min C. 15 min D. 20 min Explanation: Combined rate.