Question 1 of 10 · 0 correct so far
Difficulty: Medium
Short answer
Triangles in a row are built from matchsticks: Figure 1 uses 3 sticks, Figure 2 uses 5, Figure 3 uses 7. How many sticks does Figure 4 use?
Fractions like 1 1/2, 9/6 and 3/2 are all accepted where they're equal.
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