Name a key which is hardest to turn.

Which digit occurred maximum times between the number 1 and 1000?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

A number with an interesting property:

When I divide it by 2, the remainder is 1.
When I divide it by 3, the remainder is 2.
When I divide it by 4, the remainder is 3.
When I divide it by 5, the remainder is 4.
When I divide it by 6, the remainder is 5.
When I divide it by 7, the remainder is 6.
When I divide it by 8, the remainder is 7.
When I divide it by 9, the remainder is 8.
When I divide it by 10, the remainder is 9.

It's not a small number, but it's not really big, either.
When I looked for a smaller number with this property I couldn't find one.

Can you find it?

A horse was tied to a rope 5 meters long and the horses food was 15 meters away from the horse. How did the horse reach the food?

Complete the table series riddle by finding the number that can replace "??".

If it took eight men ten hours to build a wall, how long would it take four men to build it?

John was gifted a new Hayabusa. He drove x miles at 55mph. Then he drove x+20 miles at 40mps. He drove his bike for 100 minutes. How much distance did he travel?

I taste better than I can smell. Who am I?