Which of these numbers is not a prime number?
| `7` | `17` | `27` | `37` |
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Number, NAP-E3-NC11
Waleed tried to write down all the prime numbers below 20.
His list was: 3, 5, 7, 11, 13, 19
Which number below is one of the prime numbers Waleed missed?
| `2` | `9` | `15` | `23` |
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Number, NAP-G3-CA13
Which list contains only prime numbers?
| `2, 4, 5, 7` | `2, 5, 9, 13` | `2, 7, 11, 13` | `7, 13, 17, 21` |
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