Entry Exam Category: Graduate & Professional Program Admission Exams
Course: Praxis
Exam: Praxis Elementary Math 5003 Practice Test
Practice Question
Prime numbers? Select ALL.
Answer Choices
- A: 21
- B: 23
- C: 25
- D: 27
- E: 29
Correct Answer: B,E
Rationale: 23,29: no divisors but 1, self. 21: 3x7. 25: 5x5. 27: 3x9. Primes need only 1, self divisors.