The correct option is C 5
We know that sum of consecutive odd numbers is a square number.
If we subtract the consecutive odd numbers from the given square number, we will eventually get 0.
The number of steps taken to get 0 is equal to the square root of the given number.
Step 1: 25−1=24Step 2: 24−3=21Step 3: 21−5=16Step 4: 16−7=9Step 5: 9−9=0
The number of steps taken to get 0 is 5.
Hence, the square root of 25 is 5.