Quantitative Aptitude - Arithmetic Ability Questions

If a1-2a+b1-2b+c1-2c = 12, then 11-2a+11-2b+11-2c value is

If x + y = 12 and x2 + y2 = 94, then xy is 

The ratio of present ages of Ramya and Saurabh is 8:7. After 10 years the ratio of their ages will be 12:11. What is Ramya's present age?

In a mixture, ink and water are in the ratio of 8 : 5. If 24 litres of water is added to the mixture, then the new ratio becomes 8 : 11. What is the total quantity (in litres) of water in the new mixture?

ΔPQR is right angled at Q. If cosP = 5/13, then what is the value of cosecR ?

In an army selection process, the ratio of selected to unselected was 6:1. If 90 less had applied and 30 less selected, the ratio of selected to unselected would have been 8:1. How many candidates had applied for the process?

If 35% of A is equal to 60% of B, then what is the ratio of A and B?

The value of x for which the expressions 7x + 13 and 13x - 7 become equal is _____