F the family decides to fly, they know that they will need a rental car for at least part of their trip. Gabriela and Luis estim
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If we assume the club membership includes
then the blanks in the Juniors circle must be filled in with 6 and 8 (with the 8 going in the overlap with girls). The remaining blank in the Girls circle must be filled in with 12, the number of senior girls. The blank outside both circles is the number of senior boys (members who are not juniors and not girls), 16.
Let 
, so that 
is the digits in the tens place and 
is the digit in the ones place. (Clearly 
.)
There are five possible two digits integers that satisfy this relation:
But the first, third, and fifth candidates are even, so they are not prime. The remaining are prime, however, so
or 
.
There are five possible two digits integers that satisfy this relation:
But the first, third, and fifth candidates are even, so they are not prime. The remaining are prime, however, so