Find the missing number in the series: 2, 5,__ , 19 , 37, 75

1. 10 2. 9 3. 7 4. 8

Your Answer

answer is 9

75 previous number is 37 so 37*2+1=75
37 previous number is 19 so,19*2-1=37
      assume 19 previous number is x:
 19 previousnumber is x so x*2+1    
by substitute the given options in x
                      1.10*2+1=21(is not the next number)
                      2.9*2+1==19(is the next number)
                     3.3*2+1=7
                     4.8*2+1=17
so the option 2 is correct bcz  x of next number is 19
 

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