Is 25,36,49,64,81,100,are perfectt square root, if no why

Yes these numbers are a perfect square root because:
Square root of 25 is 5 times 5
Square root of 36 is 6 times 6
Square root of 49 is 7 times 7
Square root of 64 is 8 times 8
Square root of 81 is 9 times 9
Square root of 100 is 10 times 10
HOPE THIS HELPS! ^_^

25,36,49,64 and 100 are square roots 81 is not perfect because no number multiplied by itself goes into 81

Hope this helps!

Answer\ __o_o__/ lil i don’t kniw