Question is

Is positive integer n divisible by 4 ?

1)n^2 is divisible by 8

2) sqrt n is an even integer.

Now answer states both options alone are enough to answer the question but my question is for second option

you have sqrt 16 = 4 (divisible by 4 and also even integer) but then you got sqrt 100 = 10 (even integer but not divisible by 4)

What do you guys think ?

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