If D stands for x, S stands for +, A stands for - and M stands for ÷, what is the value of the given expression

If MOTHER is coded as KMRFCP, then HOUSE is coded as

Options:

From the given alternative words, select the word which cannot be formed using the letters of the given word:
ADMINISTRATION

Two years ago, Aadhya was three times as old as his son and two years hence, twice her age will be equal to five times that of her son. Find Aadhya's present age.

Introducing a lady, a lady said, "She is the only daughter of Mohan's grandfather who is my husband's father". How does the lady relate herself with the introduced lad

Which one number when placed at the sign of interrogation shall complete the series
3, 6, 18, 72, ...?..., 2160