Question 21
Lea, Ida and Mia each have a box of sticks. One has 1 cm sticks, another 2 cm sticks and another 3 cm sticks, but we do not know who has which. Lea puts down the first stick. Then the girls add sticks to its right in the order Mia, Ida, Lea, Mia, Ida, Lea, and so on. The final straight line is 50 cm long. Which two sticks are at its beginning and end?
