Quantitative Aptitude - Arithmetic Ability Questions

The milk and water in two vessels are in the ratio of 3 : 1 and 7 : 11 respectively. In what ratio should the liquid in both the vessels be mixed to obtaina new mixture containing half milk and half water?

When a number is increased by 120, it becomes 130% of itself. What is the number?

x and y are two numbers such that their mean proportion is 9 and third proportion is 243. What is the value of x and y?

If 3x - 10 = -(2x + 5), then the numerical value of (x - 4)3 is

Type 1 workers can do three times the work of Type 2 workers. Twelve Type 1 workers can complete a task in 10 days. How many days would it have taken 4 Type 1 and 8 Type 2 workers to complete the same task?

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?

What is the sum of first 40 terms of 1 + 3 + 4 + 5 + 7 + 7 + 10 + 9 + ....?

What is the value of tan­ -240°?