By interchanging the given two signs which of the following equation will be not correct?
 + and –

Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.
 17 * 11 * 42 * 2 * 7 = 18

Directions: In each of the following questions which of the answer figures is exactly the mirror image of the given figure when the mirror is held at AB?

Question figure.

Select the set in which the numbers are related in the same way as are the numbers of the following set. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g., 13 – Operations on 13 such as adding /subtracting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is NOT allowed).
 (25, 9, 56)
 (13, 14, 183)

Select the option that is related to the fourth term in the same way as the first term is related to the second term and the fifth term is related to the sixth term.
 8 : 496 :: ? : 204 :: 9 : 711

if a=26 and b=22, then the value of   $${{a^3-b^3}\over {a^2-b^2}}-{3ab\over a+b}$$ is

 R + S means ‘R is the daughter of S’
 R = S means ‘R is the father of S’
 R ÷ S means ‘R is the wife of S’
 R × S means ‘R is the brother of S’
 E ÷ F × J + L = M, then how is L related to E?

what is the value of the expression
 cos 2A cos2B+sin²(A-B)-sin²(A+B)?