# Friday Riddle / Teaser - EARLY

nudgie
Member Posts:

**1,478**Member
I will be unplugged until Monday, so I am posting early:

The numbers 2 and 5 are the only two prime numbers that end 2 or 5. What is the rationale for the following group of numbers:

3 17 31 47 61

7 19 37 49 67

11 23 41 53 71

13 29 43 59 73

The numbers 2 and 5 are the only two prime numbers that end 2 or 5. What is the rationale for the following group of numbers:

3 17 31 47 61

7 19 37 49 67

11 23 41 53 71

13 29 43 59 73

0

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