Count the squares in the matchstick puzzle below?

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 is the son of Jacob.
So,
Jacob is the_____of John's father?

The Little ant seems to be always confused. Do you know why?

What have one eye but still cannot see?

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

The more you take me, the more you leave me behind.
Who Am I?

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?

What does this mathematical rebus means ?