Puz­zle: Marie, Claude, and Jean are in a com­pe­ti­tion. Here are their results: The youngest per­son received the least points. Claude got half of the points of the eldest. Jean received as many points as both oth­ers combined. Ques­tion: Who is the eldest ? The Brain Exercise: This puz­zle uses plan­ning and rea­son­ing skills. You read…