Quantitative Aptitude - Arithmetic Ability Questions

The brother is elder to his sister by 6 years. Seven years ago the product of their ages was 72. What is the age of the brother?

A shopkeeper, sold cocoa seeds at the rate Rs 1330 a kg and bears a loss of 15%. Now if he decides to sell it at Rs 1463 per kg, what will be the result?

In a class of 50 students there are 22 girls who scored an average of 35 marks in the test. What is the average marks of the boys if the class average is 42 marks?

If x=8+215, then what is the value of x+1x?

If Tan θ = 9/40, then Sec θ = ?

Find the LCM of 3.2, 2.72, 1.28 and 1.44

If A/3 = B/2 = C/5, then what is the value of ratio (C + A)2 : (A + B)2 : (B + C)2?

A can do 75% of a job in 18 days and B can do 25% of the job in 12 days. If they work on it together, in how many days can they do 75% of the job?