15 men can remove 750 bushes in 25 hours. If 5 men leave the job, How many bushes will be removed in 15 hours ?

The following table shows the number of students from 4 different schools playing different games. What is the ratio of the total students who played Basketball in School A and C together to the total students who played Football in school B and D together?

A boat can go 60 km downstream and 40 km upstream in 12 hours 30 minutes. It can go 84 km downstream and 63 km upstream in 18 hours 54 minutes. What is the speed (in km/h, to the nearest integer) of the boat in still water?

Jeevan writes numbers 1 to 100 on a rectangle, which is divided into hundred equal squares. Minu shades all multiples of 8 in it with yellow. Mahin shades multiples of 9 in it with green. Then the largest number in the rectangular array, which has both colours is

If 3 sin² θ + 4cos θ - 4 = 0, 0° < θ  < 90°, then the value of (cosec² θ + cot² θ) is

The difference between the simple interest and compound interest (interest is compounded half yearly) on a sum at the rate of 25% per annum for one year is ₹ 4375. What will be the principal?

Taps P, Q, and R can fill a tank in 20, 25, and 40 hours respectively. Taps Q is kept open for 10 hours, and then tap Q is closed, after that tap P and R are opened. Tap R is closed 9 hours before the tank overflows. How long does it take to fill the tank?

A vessel contained a solution of acid and water, in which water was 64%. Four litres of the solution was taken out of the vessel and the same quantity of water was added. If the resulting solution contains 30% acid, the quantity (in litres) of the water in the solution, at the beginning in the vessel, was:

The simple interest on a certain sum of ₹ P at a rate of r% per annum for 3 years is Rs.11,250 and the compound interest on the same sum for 2 years at the same rate percent p.a. is ₹ 7,650. What is the value of P and r, respectively?

The value of (6^-1 - 7^-1)^-1 - (2^-1 - 3^-1)^-1 ÷ (-6)^-1 is