Find the odd one out in the set:
{19, 37, 21, 17, 23, 29, 31, 11}

প্রশ্ন: Find the odd one out in the set:
{19, 37, 21, 17, 23, 29, 31, 11}

সমাধান:
19: Prime
37: Prime
21: Not prime (divisible by 3 and 7)
17: Prime
23: Prime
29: Prime
31: Prime
11: Prime