A wholesaler purchased 7 hair clips for a rupee. How many for a rupee must he sell to get profit of 40%?

If 80 Persons can finish a work in 16 days by working 6 hours a day, the number of hours a day should 64 persons work to finish that same job in 15 days is:

A person invested some amount at the rate of 12 % simple interest and a certain amount at the rate of 10 % simple interest for 1 year. He received yearly interest of Rs. ₹ 130, but if he had interchanged the amount invested, he would have received 4 more as interest. How much did he invest at 12 % simple interest? 

The average of five numbers is  27.  If one  number is excluded. The average becomes 25. The excluded number is

Solve it 0.002 × 0.5=?

The diameter of two cones is the same. If the ratio of their slant height is 5 : 4, then find the ratio of their areas. 

If a 7-digit number 54p3987 is divisible by 11 , then p is equal to:

If a merchant offers a discount of 40% on the marked price of his goods and thus ends up selling at cost price, what was the % mark up? (Answer in Percent)