Quantitative Aptitude - Arithmetic Ability Questions

A sum of Rs. 3000 amounts to Rs. 6000 in two years at compound interest. The interest for four years is

If the ratio of cost price and selling price be 10:11, then the profit percentage is

If the number 583_437 is completely divisible by 9, then the smallest whole number in the place of the blank digit will be

If the equation 4x + 3y + 5 = 0 and 6x - ky - 7 = 0 have no solution, then the value of k is

By increasing the price of entry ticket to a fair in the ratio 13:16, the number of visitors to the fair has decreased in the ratio 11:9. In what ratio has the total collection increased or decreased?

A's income is 25% more than B's income. B's income is what percent of A's income?

What is the value of (cot30°+ 2/√3) ?

If in a triangle ABC, Sin A = Cos B then the value of Cos C is