Quantitative Aptitude - Arithmetic Ability Questions

If x3 – 4x2 + 19 = 6(x – 1), then what is the value of [x2 + (1/x – 4)]?

Present age of A is 2 times the present age of B. After 8 years the B's age will be 4 times of C's present age. If C celebrated his fifth birthday 9 years
ago, then what is the present age (in years) of A?

Ram's father is twice as old as Ram is. Eight years ago the age of Ram's father was 2.5 times his age. What is Ram's current age?

What is the average of 36, 43, 51, 68, and 77?

2*[­0.3(1.3 + 3.7)] of 0.8 = ?

If a sum of money deposited in a bank at simple interest is doubled in 6 years, then after 12 years, the amount will be

If a - b = -7 and a2+ b2= 85, then find ab.

In the first 10 overs of a cricket game, the run rate was only 3.2. The run rate in the remaining 40 overs to reach the target of 282 runs is