Quantitative Aptitude - Arithmetic Ability Questions

Among three numbers, the first is twice the second and thrice the third, If the average of three numbers is 517, then what is the difference between the first and the third number?

7 litres mixture of milk and water contains 30% water. 3.5 litres of milk is added to this mixture. What is the percentage of water in the new mixture?

The value of x for which the expressions 15 ­ 7x and 15x + 7 become equal is _____.

If secA = x, then the value of x is

If (cotA - cosecA)2 = x, then the value of x is

If 4(x + 5) -­ 3 > 6 -­ 4x ≥ x -­ 5; then the value of x is

What is the value of sec2θ + 1sec2θ - 1 x 12cotθ - tanθ ?

Coefficient of x2 in 6x3 + 4x2 + 2x + 3 is