Find the missing number in the series: 5, 10, 20, 40, ?

C. 80

In a coding system, 'FLOOR' is coded as 'GMPPS'. If 'DOOR' is coded as 'EPPQ', what is the code for 'WINDOW'?

C. XJQZOW

What is the H.C.F. of the polynomials 2x^2 + 4x and 4x^2 + 8x?

A. 2X

If '>' represents greater than, '<' represents less than, '=' represents equal to, and '?' represents not equal to, which of the following is true? 5 < 3 > 2 = 2?

B. FALSE

Identify the missing term in the series: 3, 6, 11, 18, ?

A. 25