Quantitative Aptitude - Arithmetic Ability Questions

The mean of 10 observations is 17. One more observation is included and the new mean becomes 16. The 11th observation is

Dipali bought a set of cups for Rs. 375, but then had to sell it later to clear old stocks for Rs. 345. What is the percentage of loss that she incurred?

A man travelled at 40 kmph. Had he increased his speed by 16 kmph, he would have covered 80 km more in the same time. Find the actual distance travelled?

What is the value of (sinA -­ 2sin3A)/(2cos3A -­ cosA)?

If 4(4x + 5) > 2x - 1 > 4x - 3, then the value of x is

If ax + by = 1 and bx + ay = 2aba2+b2 then x2+y2a2+b2 is equal to

The slopes of two lines are 1 and √3. What is the angle between these two lines?

If x = cosecθ - sinθ and y = secθ - cosθ, then the relation between x and y is