Hints:
1. 2,3,5,5,8,7,11 _,_,_,17,_,_,_
Looks to me a sandwiched arithmetic sequences of 2,5,8,11,14,17... and 3,5,7,9,...
2. 3,4, 3,4,5, 3,4,5,_, _,_,_,_,7
3. 1,2,1, 1,2,3,2,1, 1,2,3,4,3,_,_, 1,2,_,_,_,_,_,2
Fill in the blanks with the numbers that complete the sequence, and
briefly explain the rule you used
2,3,5,5,8,7,11 _,_,_,17,_,_,_
3,4,3,4,5,3,4,5,_,_,_,_,_,7
1,2,1,1,2,3,2,1,1,2,3,4,3,_,_,1,2,_,_,_,_,_,2
2 answers
890;891 897