While selling an article, a shopkeeper gives a discount of 5%. If he gives a discount of 7%, he earns Rs.15 less as profit. The marked price of the article is -

P can do a piece of work in 60 days & Q can do the same work in 50 days. Find the ratio of working efficiencies of P to Q.

A shopkeeper bought 25 kg. of pulses at the rate of Rs. 54 kg. He sold forty percent of the total quantity at the rate of Rs. 50 per kg. at what price per kg should he sell the approximately quantity to make 25% overall profit ?

The average age of five girls is 11. The oldest among them is 15 years old. What is the average age of the others?

In a school, if there are 36% boys and 352 girls, then the number of boys is ________.

If p³ – q³ = (p-q)[(p-q)²+xpq)] then the value of x is

What annual instalment will discharge a debt of ₹ 6450 due in 4 years at 5% simple interest?

B starts 4 minutes after A from the same point, for a place at a distance of 7 miles from the starting point. A on reaching the destination turns back and walks a mile where he meets B. If A's speed is a mile in 8 minutes then B's speed is a mile in ____ minutes.