natasha has many sticks of length 1. the sticks are coloured either blue, red, yellow or green. She wants to make a 3×3 grid, as shown, so that each1×1 square in the grid has four sides of different colours. What is the smallest number of green sticks that she could use?
give me the answer in number not in fraction
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Answer:
7 green stick
Step-by-step explanation:
1×1=red, green, yellow, blue
3×3 square
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