Arun bought an old computer and spent ₹110 on its repairs. He then sold it to Bhola at a profit of 20%. Bhola sold it to Chandan at a loss of 10%. Chandan finally sold it for ₹1,188 at a profit of 10%. How much did Arun buy the computer for?

28 men can complete a piece of work in 15 days and 15 women can completed the same piece of work in 24 days. What is the respective ratio between the amount of work done by 30 men in 1 day and the amount of work done by 18 women in 1 days? 

The factors of  $$ x^2-2x-15 $$ are: 

The average age of 30 students of a class is 15 years. A 20-year-old student left the class and replaced by two new students, whose age difference is 5 years. If the average age of all students is 15 years, then what will be ratio of young student to elder students. 

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

23.56 + 134.44+ 4142.25=?

The following table shows the number of pens and the number of erasers of 6 different colours that were sold from a stationery store during a given week. 

The total number of erasers having colours C3 or C4 is approximately what percentage of the average number of pens of each colour?

if a³b = abc = 180, a, b, c are positive integers, then the value of c is 

The point P(a, b) is first reflected in origin to P1 and P1 is reflected in Y-axis to (4, -3). What are the coordinates of point P?