Quantitative Aptitude - Arithmetic Ability Questions

If x + y = 10 and x2 + y2 = 68, then find xy

An alloy is made by mixing metal A costing Rs 2000/kg and metal B costing Rs 400/kg in the ratio A:B = 3:1. What is the cost (in Rs) of 8 kilograms of this alloy?

If x2+ x = 19, then what is the value of (x + 5)2+ [1/(x + 5)2]?

∆XYZ is right angled at Y. If tanX = 24/7, then what is the value of cotZ ?

Marked price of an item is Rs 500. On purchase of 2 items discount is 8%, on purchase of 3 items discount is 16%. Radha buys 5 items, what is the effective discount?

Select the odd word/letters/number/number pair from the given alternatives.

If the length of the side of an equilateral triangle is 8 cm, what is its area?

Ravindra walks at 6 km/hr and Riya cycles at 11 km/hr towards each other. What was the distance between them when they started if they meet after 42 minutes?