Question 24
Each square of the 3×3 grid contains at least one sweet. The number in a square is the total number of sweets in its neighbouring squares. Two squares are neighbours if they share a side. How many sweets are there in all 9 squares?
Editorial note: the Vietnamese grid dimension is corrupted in the uploaded paper. It is restored as 3×3 from the diagram and the reference to nine squares.
Editorial note: the Vietnamese grid dimension is corrupted in the uploaded paper. It is restored as 3×3 from the diagram and the reference to nine squares.