State which of the following statements are true and which are false. Justify your answer.
State which of the following statements are true and which are false. Justify your answer.
(i) 37 ∉ {x | x has exactly two positive factors}
(ii) 28 ∈ {y | the sum of the all positive factors of y is 2y}
(iii) 7,747 ∈ {t | t is a multiple of 37}
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