25. In the Kangaroo Republic each month consists of 40 days, numbered 1 to 40. Any day whose number is
divisible by 6 is a holiday, and any day whose number is a prime is a holiday. How many times in a
month does a single working day occur between two holidays?
(A) 1 (B) 2 (C) 3 (D) 4 (E) 5
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