Q: Does "end" have the same meaning in the following two sentences?

She knotted the end of the thread.

The ends justify the means.

A: different meanings

Q: Does "do" have the same meaning in the following two sentences?

Will $100 do?

A 'B' grade doesn't suffice to get me into medical school.

A: the same meaning

Q: Does "admit" have the same meaning in the following two sentences?

We can not admit non-members into our club building.

She admitted us here.

A:
the same meaning