Quantitative Aptitude - Arithmetic Ability Questions

If 9x+2 = 240 + 9x, the value of (8x)x is

If x+19x=4, then 9x2+19x2 is

A T.V was sold at a profit of 5% If it had been sold at a profit of 10% , the profit would have been Rs. 1000 more. What is its cost price ?

When a number is increased by 18, it becomes 106% of itself. What is the number?

If two successive discounts of 30% and 10% are given, then what will be the ratio of marked price to selling price?

The points A(3,­-2), B(1,4) and C(­-2,x) are collinear. What is the value of x?

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

Calculate the area (in cm2 ) of a circle of radius 10.5 cm.