There are four people in a line. Sarah is between Barry and Mary. Mary is in front of two other people, and John is directly in front of Mary.
Who’s first in line, second, third, and fourth?
Answer
From first to last: John, Mary, Sarah, Barry
Let’s name John, Mary, Sarah, Barry as J, M, S and B respectively.
- Sarah is between Barry and Mary: B S M or M S B.
- John is directly in front of Mary: J M
- Mary is in front of two other people: M S B
From (2) and (3), we get J M S B