Question

Find out the missing number in the series. 9, 43, 13, 41, __, 39, 21, 37, ...

Answer 1

Answer:

17

Step-by-step explanation:

here we can see in 9,43,13,41,_,39,21,37.. that

in 13 &9 there was difference of 4 and in 43&41 there is va difference of 2 and since in every pair such as 9,43,13,41,_,39,21,37 we can see that 43 ,41,39,37 have a difference of 2 so like wise it will be followed in 9 ... ,21 that's why the answer is 17.