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# Hi, is nth-child (4n) the best solution? Instead (3n+1) may be the correct formula if many more images were in list.

There are 3 columns displayed. You want to select the 1st (leftmost) image in each row: 1st, 4th, 7th, 10th ... image (I realize here there are only 5 images in this example). Then you clear left to make this the first element of each row clear the image caption text of the above row. The formula for this is 3n+1, not 4n. Am I missing something?

Hi Chris,

See the Teacher's Notes below the video. :)

Thank you, I did not check the notes last night. (3n+1) is the better solution.

Thank you very much Isaac for the mention.

Hi chris, 4n it's not the same as 3n+1 , for example:

3n+1 (3 x 0) + 1 = 1 = 1st Element (3 x 1) + 1 = 4 = 4th Element (3 x 2) + 1 = 7 = 7th Element etc.

4n (4 x 0) = 0 = 0 Element (4 x 1) = 4 = 4th Element (4 x 2) = 8 = 8th Element etc.

Thanks, (4n) is not the same formula as (3n+1). I see the code correction in the notes that agrees with (3n+1) as best solution.

Thanks, that really helped me out!