Quantitative Aptitude - Arithmetic Ability Questions

Determine the value of 1r+1s when r3+s3=0 and r+s=6 ?

When 0.151515.....is converted into a fraction, then the result is

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

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

A 1.6 m tall observer is 45 meters away from a tower. The angle of elevation from his eye to the top of the tower is 30°, then the height of the tower in meters is

2 ­- (cosA + sinA)2 is equal to

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

If P + 1P+2 = 1, then the value of P+23+1P+23-3 ?