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A list is made of all possible 2-digit whole numbers that result from using only the digits 1,3,5, and 7 in both the ones and tens place, with duplications allowed. How many whole numbers in the list are
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5 votes
5 votes
A list is made of all possible 2-digit whole numbers that result from using only the digits 1,3,5, and 7 in both the

ones and tens place, with duplications allowed. How many whole numbers in the list are prime numbers?

A.6
B.7
C.8
D.9
E.10​

User Stevenmw
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1 Answer

14 votes
14 votes
I think 8.
11, 13, 17, 31, 37, 53, 71, 73
Good luck
User Pierpaolo Follia
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3.1k points
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