Series Riddles

Popular Number Sequence Puzzle
3 1 2 2 1 1
1 3 1 1 2 2 2 1

Line 1 is 'Two ones' (2 1)
Line 2 then becomes 'One two, and one one' (1 2 1 1)
Line 3 therefore is 'One one, one two and two ones' (1 1 1 2 2 1)
Line 4 is 'Three ones, two twos and one one' (3 1 2 2 1 1)
Line 5 is 'One three, one one, two twos and two ones' (1 3 1 1 2 2 1 1)

Each word rhymes with its numeric position in the list. (e.g. 'gun' rhymes with 'one', etc.)

The letters are the first letters of the words in the question. Thus, the next two letters are A and W.

8
No Of circles in the number.

The answer is
(15 - 9) + (13 - 7) + (7 - 1) + (9 - 1) + (13 - 9)

If you calculate it, you will get
6 + 6 + 6 + 8 + 4 = 30

11.3135 + 9.3115+ 9.375

The series lists numbers that are flanked by two prime numbers.

4 (3 and 5 are prime)
6 (5 and 7 are prime)
12 (11 and 13 are prime)
18 (17 and 19 are prime)
30 (29 and 31 are prime)
42 (41 and 43 are prime)
60 (59 and 61 are prime)
72 (71 and 73 are prime)
102 (101 and 103 are prime)
108 (107 and 109 are prime)

thus

138 (137 and 139 are prime), 150 (149 and 151 are prime), 180 (179 and 181 are prime

The next one is 8
77 : 7*7 = 49
49 : 4*9 = 36
36 : 3*6 = 18
18 : 1*8 = 8

'2'
This single sequence in fact consists of two sequences: the first sequence is 2-3-4-5-... and the second sequence is 9-18-36-72-... . To make the puzzle harder, all digits have been placed apart. Conclusion: the next term in the sequence is a '2'.

60. 100 years in a century, 365 days in a year, 24 hours in a day, 60 minutes in an hour, & 60 seconds in a minute.