Quantitative Aptitude - Arithmetic Ability Questions

If θ is acute angle and tan θ – cot θ = 0, then what is the value of tan26θ + cot100θ?

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

How long does a train, 75 m long, moving at 60 km/hr take to pass a certain telegraph post?

If Rajan purchase 21 pens for Rs 20 and sell all the pens at the rate of 20 pens for Rs 21, then what will be the profit percentage?

The average of 100 observations was calculated as 35.It was found later, that one of the observation was misread as 83 instead of 53. The correct average is :

If a(x + y) = b(x - y) = 2ab, then the value of 2(x2 + y2)

If x = 1.1, then what is the value of 4x2 -4x + 1 ?

Select the odd number from the given alternatives.