Quantitative Aptitude - Arithmetic Ability Questions

If cotθ = 4, then the value of 5sinθ+3cosθ5sinθ-3cosθ is

x, y and z are real numbers. If x3 + y3 + z3 = 13, x + y + z = 1 and xyz = 1, then what is the value of xy + yz + zx?

If 25% of an electricity bill is deducted, Rs 1788 is still to be paid. How much was the bill?

The ratio of three numbers is 5 : 6 : 8. If the sum of the three numbers is 380, then what is the smallest among the three numbers?

The value of Cot17°Cot73°Cos222° + 1Cot17°Sec268° is

What is the value of (cosecA - cotA) / (secA + tanA)?

At what rate of compound interest (in %) per annum will a sum of Rs. 15,000 become Rs. 18,150 in 2 years?

Find the least number which must be subtracted from 18265 to make it a perfect square