Quantitative Aptitude - Arithmetic Ability Questions

Cost price of a calculator is Rs 495. If the profit percentage is 40%, then what is the value (in Rs) of profit?

A wholesaler sells a watch to a retailer at a profit of 33% and the retailer sells it to a customer at a loss of 20%. If the customer pays Rs 2,181.2, what had it cost the wholesaler?

If a dairy mixes cow's milk which contains 10% fat with buffalo's milk which contains 20% fat, then the resulting mixture has fat (120/7)% of fat. What ratio was the cow's milk mixed with buffalo's milk?

If P : Q : R = 2 : 3 : 5, then what is the value of (P + Q) : (Q + R) : (R + P)?

90% of X = 40% of Y and Y = a% of X. What is the value of a?

What is the length of the side of a regular hexagon, if its area is 54√3 sq cm?

If a-b=1 and a3-b3 = 61, then the value of ab will be

If the product of two numbers is 4941 and their LCM is 81, then their HCF is :