If X is the biological sister of Y, and Y is the biological mother of Z. What is the precise relationship of X to Z?

Pointing to a photograph of a man, a woman says, 'His mother is the only daughter of my mother.' How is the woman related to the man?

A is the biological brother of B. B is the biological brother of C. C is the biological husband of D. How is A related to D?

From the letters of the word 'DEPARTMENT', which of the following words CANNOT be formed? (Letters cannot be used more times than they appear).

From the letters of the word 'SIGNATURE', which of the following words CANNOT be formed? (Letters cannot be used more times than they appear).

From the letters of the word 'GOVERNMENT', which of the following words CANNOT be formed? (Letters cannot be used more times than they appear).

From the letters of the word 'CONSTRUCTION', which of the following words CANNOT be formed? (Letters cannot be used more times than they appear).