11th Girl from Both Ends All the girls of Mary’s class are standing in a row. Mary is the 11th girl from both ends. How many girls are studying in Mary’s class? Answer 21 girls. 1 2 3 4 5 6 7 8 9 10 11 10 9 8 7 6 5 4 3 2 1 « Previous RiddleTwo Mathematicians and a Coin Next Riddle »In Two Years I Will Be Twice as Old