Answer:
1849
Explanation:
1 - 1
2 - 4
3 - 9
4 - 16 (drew this one out)
We can see that each of the triangles is the number of the picture squared. So for the 43rd picture we take 43 * 43 = 1849
So the 43rd picture is 1849
6.0m questions
7.8m answers