Quantitative Aptitude - Arithmetic Ability Questions

What is the area (in sq cm) of a rhombus if the lengths of its diagonals are 25 cm and 20 cm?

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

If x = 4aba+b, then what is the value of x+2ax-2a+x+2bx-2b ?

If 3x+22x+1 = a2x+1+bx+2 be an identity, then the value of b

The bus fare between two cities is increased in the ratio 25:29. Find the increase in the fare, if the original fare is Rs. 625

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

Four pairs of words are given. Find the odd one out.

The ratio 1 : 5 can be expressed in decimal as