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Question
Which of the following has 3 different prime factors?
Which of the following has 3 different prime factors?
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Solution
The correct option is D 42
20 = 2 x 2 x 5
12 = 2 x 2 x 3
36 = 2 x 2 x 3 x 3
42 = 2 x 3 x 7
20 = 2 x 2 x 5
12 = 2 x 2 x 3
36 = 2 x 2 x 3 x 3
42 = 2 x 3 x 7
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