Quantitative Aptitude - Arithmetic Ability Questions

The value of the expression 2(sin6θ+cos6θ) - 3(sin4θ+cos4θ) + 1 is

If cot ­-4π/3 = x, then the value of x is

A factory buys 10 machines. 2 Machine­A, 3 Machine­B and rest Machine­C. Prices of the machines are Rs 95000, Rs 60000 and Rs 50000 respectively. What is the average cost of these machines?

Z’s present age is 55 years. If 11 years ago, C’s age was 1/11 of Z’s age, then after how many years C’s age will become 37 years?

If 20 men working 8 hours per day can complete a piece of work in 21 days. How many hours per day must 48 men work to complete the same job in 7 days?

Twenty one times of a positive number is less than its square by 100. The value of the positive number is

A, B and C are employed to complete a work in Rs. 784. If A and B together complete 23/28 of the work. Calculate the wages (in Rs.) paid to C?

If 4r = h + r2+h2 then r: h = ? (r not equal to 0)