Verbal Intelligence Test - 2

What comes next in the following numbers?



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ISSB Intelligence Test
1.    2, 7, 16, 33..
   

   
ISSB Intelligence Test
2.    4, 3, 2, 1,......?
   

   
ISSB Intelligence Test
3.    2, 5, 25, 3, 6, .....
   

   
ISSB Intelligence Test
4.    9, 7, 5, 3, 1,.......?
   

   
ISSB Intelligence Test
5.    9, 6, 4, 3,.......?
   

   
ISSB Intelligence Test
6.    15, 10, 6, 3,.......?
   

   
ISSB Intelligence Test
7.    7, 9, 12, 16,.......?
   

   
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8.    2, 3, 5, 8,.......?
   

   
ISSB Intelligence Test
9.    19, 18, 9, 8,.......?
   

   
ISSB Intelligence Test
10.    47, 23, 11, 5,.......?
   
   
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