A certain number of men can complete a work in 17 days working 8 hour a day. If the number of people is decreased to 60%. Then, find in how many hrs in a day should the remaining people work to complete the work in 51/2 days?

In a lottery, there are 7 prizes and 21 blanks. If a lottery is drawn at random, then what is the probability of getting a prize?

The sum of money that will yield Rs. 60 as simple interest at the rate of 6% per annum in 5 years is-

If x is real then the minimum value of (x²-x-1) is :

The cash difference between the selling price of an article at a profit of 8 % and 12 % is Rs 3. The ratio of two selling prices is:

A man can row downstream at a speed of 15 km/h and upstream at 11 km/h. Find his speed in still water and the speed of the current, respectively. [Give both your answers in km/h]

The equivalent single discount for two successive discounts of 15% and 10% is

A vendor sells potatoes at a cost price, but he mixes some rotten potatoes and thereby gains 25%. The percentage of rotten potatoes in the mixture is?