Directions: Use the digits 1 to 9, at most one time each, to make 5 prime numbers.

### Hint

What numbers should not go in the one’s place?

What are the single digit prime numbers?

What are the single digit prime numbers?

### Answer

Number of Unique Solutions: 8

1: 2, 41, 53, 67, 89

2: 2, 41, 59, 67, 83

3: 2, 47, 53, 61, 89

4: 2, 47, 59, 61, 83

5: 5, 23, 41, 67, 89

6: 5, 23, 47, 61, 89

7: 5, 29, 41, 67, 83

8: 5, 29, 47, 61, 83

1: 2, 41, 53, 67, 89

2: 2, 41, 59, 67, 83

3: 2, 47, 53, 61, 89

4: 2, 47, 59, 61, 83

5: 5, 23, 41, 67, 89

6: 5, 23, 47, 61, 89

7: 5, 29, 41, 67, 83

8: 5, 29, 47, 61, 83

Source: Owen Kaplinsky

7,17,13,37,47

3

5, 61, 23, 47, 89

3, 11, 13, 17, and 19 are all prime.

7 17 13 37 47

7, 17, 13, 19, 37.

0,23,41,57,89

2,13,41,97,89

7,56,83,41,29

1, 23, 46, 57, 89

5, 29, 47, 61, 83

1: 2, 41, 53, 67, 89

2: 2, 41, 59, 67, 83

3: 2, 47, 53, 61, 89

4: 2, 47, 59, 61, 83

5: 5, 23, 41, 67, 89

6: 5, 23, 47, 61, 89

7: 5, 29, 41, 67, 83

8: 5, 29, 47, 61, 83

Prime numbers I can make are 5,12,6,2,and 67

The prime numbers I found are 5,29,47,61,83.

I got 5,29,47,61,83

2 3 5 7 11