The given number series 9, 19, 21, 43, 45, ... follows a pattern that
ALternately (x 2 + 1) and (x 1 + 2)
9
9 x 2 + 1 = 19
19 x 1 + 2 = 21
21 x 2 + 1 = 43
43 x 1 + 2 = 45
45 x 2 + 1 = 91
Hence, the next number in the given sequence is 91.
Former is the food for latter.
As, 4 : 9 similarly 8 : 13
? ? = 13
Lotus grow on land.
Tree, rest all are the parts of a tree.
All are games.
All others have two vowels.
Except the 'Publisher' , all other are related to 'literature' .
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