Question

find the missing number of the followung series 5,9,25,?,521​

Answer 1

Answer:

81

Step-by-step explanation:

first number is [5] then (one space after 5 is 9) neglecting it, other number is 25 which is square of (5).

in same way second number is (9) and after (one space of 9 is 25)neglecting it 81 which is square of 9