If A is the brother of B and C is the sister of B, what is C to A?

A. SISTER

If X ÷ Y means X is the uncle of Y, X - Y means X is the aunt of Y, and X + Y means X is the cousin of Y, what is the relationship of Z if X ÷ Z - Y?

B. Z IS THE NIECE OF Y

If the word 'CAT' is coded as 3120, what is the code for 'DOG'?

A. 4157

If 'APPLE' is coded as 195312, what is the code for 'GRAPE'?

A. 718165

If A + B means A is the brother of B, A - B means A is the sister of B, and A × B means A is the father of B, what is the relationship of C if A + C × B?

C. C IS A'S SON