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Which of the following numbers is not divisible only by prime numbers, itself and 1? Ext A 21 B 77 C 110 D 221 E 65
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Which of the following numbers is not divisible only by prime numbers, itself and 1?

Ext
A 21 B 77 C 110 D 221 E 65

User Nasser AlNasser
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1 Answer

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D, 221 because 21 can be divided by 3, 77 can be divided by 7 and/or 11, 110 can be divided by 11, 221---none---, 65 can be divided by 5.
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User Dave Kraczo
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