Quantitative Aptitude - Arithmetic Ability Questions

D sells a table to E at a profit of 30% and E sells it to F at a loss of 30%. What is the ratio of cost prices of D and F?

The average age of a class of 39 students is 15 years. If the age of the teacher is included, then the average increases by 3 months. Find the age of the teacher.

In a class of 66 students there are 33 girls. The average weight of these girls is 61 Kg and average weight of the full class is 66 kgs. What is the average weight of the boys of the class?

(242699 + 167109) ÷ (9946 –9446) = ?

Two successive discounts of 10% and 25% are given by Raman on a shirt. If the marked price of the shirt is Rs 600, then what is the value (in Rs) of discount?

What is the smplified value of Sin2A/1+Cos2A ?

90% of X = 40% of Y and Y = a% of X. What is the value of a?

The LCM of two numbers is 66. The numbers are in the ratio 2:3. The sum of the numbers is