So, we divide 666 by 6 to get 111. Then we divide 111 by 3 to get 37. So, the answer is a. 37.
(ii) The pattern in the series is that each number is multiplied by the next prime number. So, 2 is multiplied by 2 to get 4, 3 is multiplied by 2 to get 6, 6 is
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