This puzzle has two puzzles to solve.

The first puzzle needs you to follow the bookmark icons and match up symbols from the Test Tube puzzle. So the star = 3+4, circle = 4.5+4.5, and diamond = 4+4 which gives you the number 798. Find that card and flip it over.

The second puzzle requires having cards 538 and the Wheat. Find the sheep that match the colors of the words from top to bottom, so yellow is 7, blue is 4, and red is 2. Find card number 742.