Quantitative Aptitude - Arithmetic Ability Questions

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

If a+1a2 = 3, then the value of  a3+1a3 is

If tan(A/2) = x, then the value of x is

A train 100 m long is running at a speed of 120 kms/hr. The time taken to pass a person standing near the line is

X and Y started a business by investing Rs 171000 and Rs 243000 respectively. If X’s share in the profit earned at the end of year is Rs 3800, then what will be the total profit (in Rs) earned by them together?

If one angle of a triangle is equal to half the sum of the other two equal angles, then the triangle is

If 5x ­- 40 = 3x, then the numerical value of 2x -­ 11 is

Find the odd word/letters/number from the given alternatives.