The simple interest on a certain sum for 4 years at the rate of 15% p.a. is ₹4,500 less than the simple interest on the same sum for 6 years at the same rate of interest. Find the sum.
The average of four consecutive odd numbers is 58. What is the lowest number?
At what rate per annum will a sum of ₹6,400 fetch a compound interest (compounded annually) of ₹1,344 in 2 years?
If p : q = 5 : 2, then (p2 − q2) : (p2 + q2) = ?
Simplify the following:
15 ÷ 5 of 3 × 4 + 8 ÷ 12 of 4 × 12 - 4 ÷ 5 × 20
A man takes 30 minutes to cover a certain distance at the speed of 8 km/h. If he walks at a speed of 16 km/h, he covers the same distance in:
If there is a profit of 25% on the cost price of an article, the percentage of profit calculated on its selling price will be:
Trains A and B start at the same time. Train A travels at the speed of 50 km/h from station P to station Q and train B travels at the speed of 70 km/h from station Q to station P. They cross each other after 1 hour 20 minutes. What is the distance (in km) between station P and station Q?