A shopkeeper bought 15 kg of rice at the rate of Rs.29 per kg and 25 kg of rice at the rate of Rs.20 per kg. He sold the mixture of both types of rice at the rate of Rs. 27 per kg. his profit in this transaction is___

Two buses start at the same time from Delhi and Agra, which are 300 km. apart, towards each other. After what time will they cross each other if their speeds are 38 km per hour and 37 km per hour?

At a clearance sale, a shopkeeper gives 45% discount. If a customer paid ₹330 during the sale, then what is the marked price of that shirt?

Sum of two numbers is thrice their difference. Their ratio is 

X can do a piece of work in 6 days while Y can do the same work in 5 days. If the total amount to be given for this work is Rs. 660, what will be the share of Y, if both do the work together?

Four bells ring at the intervals of 5, 6, 8 and 9 seconds. All the bells ring simultaneously at some time. They will again ring simultaneously after: 

Find the average of all prime numbers from 1 to 20?

Direction : What should come in place of the question (?) in the following question.

(47 × 588) ÷ ( 28 × 120)=?