Can someone pls explain why the circled questions aren't elements of the followi

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secondary 4 | E Maths
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secondary 4 E Maths

Can someone pls explain why the circled questions aren't elements of the following sets

Date Posted: 6 years ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

Date Posted: 6 years ago