In the sequence 1, 3, 6, 10, what is the next number?

A. 15

A family consists of a father, a mother, and two children. The father is a lawyer, and the mother is a teacher. If one child wants to be a doctor and the other a musician, which profession is not represented in the parents' professions?

C. DOCTOR

If A=1, B=2, C=3, and so on, what is the code for the word 'CAT'?

A. 312

In a family, the father is a banker, the mother is a nurse, and they have two children. If the son wants to become a banker like his father and the daughter wants to be a nurse like her mother, which profession is not chosen by either child?

C. TEACHER

If the input is 'z y x w', what will be the output after rearranging the letters in alphabetical order?

A. W X Y Z