Q1 · hard · AI-verified
A sum of money invested at compound interest amounts to ₹4840 in 2 years and to ₹5324 in 3 years. What is the rate of interest per annum?
- 8%
- 10%
- 12%
- 15%
Q2 · hard · AI-verified
A merchant has 1000 kg of sugar, part of which he sells at 8% profit and the rest at 18% profit. He gains 14% on the whole. The quantity sold at 18% profit is:
- 400 kg
- 500 kg
- 600 kg
- 700 kg
Q3 · hard · AI-verified
In how many ways can 8 people be seated around a circular table if 2 particular persons must sit together?
- 1440
- 720
- 2880
- 5040
Q4 · hard · AI-verified
Two trains of lengths 240m and 160m are running in opposite directions at speeds of 72 km/hr and 54 km/hr respectively. How much time will they take to completely cross each other?
- 10.28 seconds
- 11.43 seconds
- 9.86 seconds
- 12.57 seconds
Q5 · hard · AI-verified
The average age of 20 students in a class is 18 years. If the teacher's age is included, the average becomes 19 years. What is the age of the teacher?
- 38 years
- 39 years
- 40 years
- 41 years