Quantitative Aptitude - Arithmetic Ability Questions

Find the missing number?

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

If the amount received at the end of 2nd and 3rd year at Compound Interest on a certain Principal is Rs 25088, and Rs 28098.56 respectively, what is the rate of interest?

If P : Q : R = 6 : 7 : 8 and R : S = 3 : 5, then what is P : S?

If x1x2x3 = 4(4 + x1 + x2 + x3 ), then what is the value of [1/(2 + x1 )] + [1/(2 + x2 )] + [1/(2 + x3 )]?

If 4x + 5y = 14 and x - 5y = 16 then the value of x and y are

At what point does the line 3x + 2y = -12 intercept the Y-axis?

Of the 3 numbers whose average is 72, the first is 2/7 times the sum of other 2. The first number is