Quantitative Aptitude - Arithmetic Ability Questions

What will be the roots of the quadratic equation x2 - 25x + 156 = 0?

What is the slope of the line, parallel to the line 3x -­ 6y = 4?

If sec2θ+tan2θ=3, then sec4θ-tan4θ =

The mean score in a test of the 12 boys in a class was 16 while the overall mean of the 30 students in the class was 18.1. What was the mean score of the girls?

If x+1x = 4, then what is the value of x6+1x6 ?

If x + [1/(x + 7)] = 0, then what is the value of x – [1/(x + 7)]?

Of the 3 numbers whose average is 40, the first is 1/3 rd the sum of other 2. What is the first number?

Ages of Lalu and Balu are in the ratio of 1 : 2. After 7 years their ages ratio changes to 3 : 5. The elder person age is