Quantitative Aptitude - Arithmetic Ability Questions

If {12(a-b)}2+ab=p(a+b)2, then the value of p is 

A fan was sold for Rs. 3600 at a loss of 4%. What would be the gain or loss percent ifit was sold for Rs. 4200?

If x/3 - [5(7x/5 - 4/3)]/2 = -x/6, then what is the value of x?

Shaan got a total of Rs. 912 in the denomination of equal numbers of Rs. 1, Rs. 5 and Rs. 10 coins. How many coins do Shaan posses?

The reciprocals of the squares of the numbers 11⁄2 and 11⁄3 are in the ratio

In a motor of 120 machine parts, 5% parts were defective. In another motor of 80 machine parts, 10% parts were defective. For the two motors considered together, the percentage of defective machine parts were

What is the slope of the line parallel to the line passing through the points (4,-2) and (-3,5)?

Find the area (in cm2) of a semi-circle of radius 28 cm.