copy inside each box the letter of the missing term in the given number sequnce.
1.) 6,7,9,_, 16,_,27
2.) 25, 24, _, 19,_, 10
3.)2,7, _, _, 22, 27,
4.) 1, 3, 9, 27, _, _
5.) 6, 10, _, 18, _, 26