Vintage 2000 Discovery Toys Busy Bugs Learning Set

This vintage Discovery toy is great for math and reading readiness. The activities encourage young children to count, sort, match patterns and use their imagination. The set includes 6 sets that f colored bugs that should include 6 bugs each. In this set the Red and Orange have 5 bugs. According to the answer key the only card that couldn’t be played is 1a. (I included a pic of answer key)