Quantitative Aptitude - Arithmetic Ability Questions

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

695 : 659 : : 839 : ?

A and B have their annual average income Rs. 80,000.
B and C have their annual average income Rs. 75,000.
C and A have their annual average income Rs. 78,000.

The annual income of A is ?

If the roots of the equation a(b – c)x2 + b(c – a)x + c(a – b) = 0 are equal, then which of the following is true?

√(1 + tan2A)/tanA is equal to

If 2x- 3(4-2x) < 4x - 5 < 4x + 2x/3, then x can take which of the following values?

If 2x - 5y = 5 and 2x - y = 9, then x - y is ______.

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

BE and CF are two altitudes of a triangle ABC. If AB = 6 cm , AC = 5 cm and CF = 4 cm , then the length of BE is