For the first problem a.k.a problem #33 I looked it up in downward pattern. For each column we can see that there is a triangle that never “moves” (red circle) and thats our reference point and it follows the clockwise pattern . So we can expect that in the third column there will be triangle with the same pattern. We can also learn the pattern from each column that there will be a plain triangle at the upper left corner. The rest is finding the alternating triangle pattern start from the first column and i guess you can just follow it with few adjustment for the rest of the columns