A goldsmith observes that one of his employees prepares a necklace in 9 hours, while another employee prepares it in 10 hours. If they work together, they stud 10 gems less every hour and thus prepare a necklace in 5 hours, then the number of gems studded in each necklace is: 

Anil, Deepak, and Dinesh together can complete a work in 35 days. Anil and Dinesh together can complete the same work in 60 days. In how many days Deepak alone can complete the same work?

The length, breadth and height of a hall are 144 m, 180 m and 384 m respectively. The length of the longest scale that can measure the three dimensions of the hall exactly is:

If a : b =4 : 5, b: c=20 : 11 and c:d =6 : 7, then value of a : b : c : d will be

A and B invested in the ratio 3 : 2 in a business. If 5% of the total profit goes to charity and A’s share is Rs. 855, find the total profit.

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

35% of 430 + ? % of 360 = 276.5

Arun buys one kilogram of apples for Rs . 120 and sells it to Swati gaining 25 %. Swati sells it to Divya and Divya again sells it for Rs. 198, making a profit of 10 %. What is the profit percentage made by Swati?