Q1 · easy · AI-verified
The ages of A and B are in the ratio 3:4. After 6 years, their ages will be in the ratio 4:5. What is the present age of A?
- 18 years
- 21 years
- 24 years
- 27 years
Q2 · easy · AI-verified
If the simple interest on Rs. 800 for 3 years is Rs. 144, what is the rate of interest per annum?
- 8%
- 6%
- 5%
- 7%
Q3 · easy · AI-verified
A man's salary is increased by 20% and then decreased by 10%. What is the net percentage change in his salary?
- 5% increase
- 8% increase
- 12% increase
- 10% increase
Q4 · easy · AI-verified
A train 150 meters long crosses a platform 250 meters long in 20 seconds. What is the speed of the train in km/hr?
- 54 km/hr
- 60 km/hr
- 72 km/hr
- 80 km/hr
Q5 · easy · AI-verified
Two pipes A and B can fill a tank in 12 hours and 18 hours respectively. If both pipes are opened together, in how many hours will the tank be filled?
- 6 hours
- 7.2 hours
- 8 hours
- 9 hours