Which of the following groups of numbers are all prime numbers? (a)2, 5, 15, 19 (b)3, 11, 23, 31 (c)2, 3, 5, 9 (d)7, 17, 29, 49

Which of the following groups of numbers are all prime numbers? (a)2,

1.	Which of the following groups of numbers are all prime numbers? (a)2, 5, 15, 19 (b)3, 11, 23, 31 (c)2, 3, 5, 9 (d)7, 17, 29, 49
Answer» <strong style="font-size: 15px; line-height: 20px !important;">Which of the following groups of numbers are all prime numbers?<br/> (a)2, 5, 15, 19 (b)3, 11, 23, 31 (c)2, 3, 5, 9 (d)7, 17, 29, 49</strong><p><strong>Solution:</strong></p>