Question

5 , 9 , 21 , 37 , 81 , ? what will be the next number? ( number series )​

Answer 1

Step-by-step explanation:

sorry .do it by calculation

Answer 2

Answer:

answer is 153

Step-by-step explanation:

if you notice then you get that every number that is given is a multiple of 4 with adding 1.

So,

5=4*1+1

9=4*2+1

21=4*5+1

37=4*9+1

81=4*20+1

so,we get a another series

1,2,5,9,20

and in this series we can see that first it is multiply by 2 then multiply by 2 and 1 is subtracted then again multiply by 2 and 1 added and then again multiplying by 2 and subtracting 2 ..

so,for finding next term we to multiply 20 by 2 and subtract 2 from the product and hence we get answer as 153....

hope it will help you