Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the odd letters from the given alternatives.

What is the measure of central angle of the arc whose length is 11 cm and radius of the circle is 14 cm?

If √(1 - sin2A) = x, then the value of x is

What number should be added to each of the numbers 35, 115, 53 and 165, so that the resulting numbers are in continued proportion?

If (x + y + z) = 12, xy + yz + zx = 44 and xyz = 48, then what is the value of x3 + y3+ z3?

A train travels 40% faster than a car. Both start from point A at the same time and reach point B, 140 km away at the same time. On the way the train takes 25 minutes for stopping at the stations. What is the speed (in km/hr) of the train?

A can paint a house in 25 days and B can do it in 10 days. Along with C, they did the job in 6.25 days only. Then in how many days, C alone can do the job?

If 5x + 1/x = 10, then x2 + 125x2 is equal to