Anuj lent Rs. 16200 to Amit at 20% p.a. compound interest, compounded annually while Anuj taken the same amount from Rajesh at 18% p.a. simple interest. Find the amount gained by Anuj in the whole process after 2 years.

Pipe ‘A’ takes 20 minutes to fill a tank. Pipe ‘B’ takes 30 minutes to empty the same tank. If pipe ‘B’ is opened 15 minutes after pipe ‘A’, then find the total time taken to fill the tank in this manner.

A 75-litre mixture contains only water and oil in the ratio 3:2, respectively. If 20 litres of the mixture is replaced with the same quantity of oil, then find the quantity of oil in the final mixture.

A 180-metre long train takes 25 seconds to cross a platform. If the speed of the train is 72 km/h, then find the length of the platform.

Ajay invested Rs. 6,000 at compound interest (compounded annually) of 30% p.a. for ‘n’ years. If he earned an interest of Rs. 4,140, then find the value of ‘n’.

Income of ‘A’ is 60% more than expenditure of ‘B’ which is equal to Rs. 300. If the savings of ‘A’ is equal to 50% of the expenditure of ‘B’ then find the expenditure of ‘A’.

Present age of ‘A’ is 40% more than that of ‘B’. If 12 years ago from, ‘A’ was twice as old as ‘B’, then find the present age of ‘B’.

The age of Arjun 4 years ago was 25% more than the present age of Rohan. 6 years hence, the ratio of their ages will be 15:11. Find the difference between their present ages.

The speed of a boat in still water is 2 times more than that of the current. If the boat takes 12 hours to cover 144 km upstream, then find the time taken by the boat to cover 480 km downstream.

What will come in place of the question mark (?) in the following series?

5, 6, 14, 45, ?,925

The following numbers form a series. Find the odd one out.

3, 6, 2, 8, 2.4, 9.6

In a school there are 840 students, and the ratio of the number of boys to girls is 5:2. If 120 boys and 180 girls took admission in the school, then find the new ratio of the number of boys to girls in the school.

Ratio of speed of boat in still water and upstream speed of boat is 6:5, respectively. If downstream speed of boat is 17.5 km/h, then find the upstream distance cover by boat in 4 hours.