Best short hard riddles

F I V E. Remove the 2 letters F and E from five and you have IV.

I'm a Riddle.

111111111 Explanation: It's a maths magical square root series as : Square root of number 121 is 11 Square root of number 12321 is 111 Square root of number 1234321 is 1111 Square root of number 123454321 is 11111 Square root of number 12345654321 is 111111 Square root of number 1234567654321 is 1111111 Square root of number 123456787654321 is 11111111 Square root of number 12345678987654321 is 111111111 (answer)

Fear. The anagram of wolf is fowl. The antonym of fowl is fair. The homonym of fair is fare. The anagram of fare is fear, which is the emotion.

A fruit fly.

White. The house is at the North Pole, so the polar bear.

The baaaahamas.

Bubble.

SIX - 9 (IX) = S 9 (IX) - 10 (X) = I 40 (XL) - 50 (L) = X

You draw a shorter line next to it, and it becomes the longer line.