Quantitative Aptitude - Arithmetic Ability Questions

If sin3A = x, then value of x is

Among three numbers, the first is twice the second and thrice the third. If the average of three numbers is 429, then what is the difference between the first and the third number?

If a+1b= b+1c = c+1a (a , b, c are not equal) then the value of abc = 

Find the LCM of 0.63, 10.5, 2.1, 4.20

If (x+1/x) = 5, then the value of 5xx2+5x+1?

Solution A contains 10% acid and solution B contains 30% acid. In what ratio should solution A be mixed with Solution B to obtain a mixture with 25% acid?

The first and last terms of an arithmetic progression are 32 and ­-43. If the sum of the series is ­-88, then it has how many terms?

If x - y = 6 and xy = 40, then find x2 + y2 ?