Question 14
Ah Meng is going to shade some squares of an 6 × 11 rectangular board in such a way that in every L-shape of the forms 
, at least half of the squares in it are shaded. Determine the smallest number of squares in the board that Ah Meng must shade in order to fulfil this condition.
, at least half of the squares in it are shaded. Determine the smallest number of squares in the board that Ah Meng must shade in order to fulfil this condition.