What famous saying does this rebus mean?

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Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

One night, a woman receives a call from the police. They tell her that her husband was murdered and that she should come to the crime scene as soon as possible. The woman drops the phone, shocked, and drives 20 minutes to the crime scene. As soon as she reaches the crime scene, the police arrest her and she is convicted of murder. How do the police know she committed the crime?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

What is common among 11, 69, and 88?

On a bright sunny day, two fathers took their son fishing in the lake. Each man and son were able to catch one fish. When they returned to their camp, there were only three fishes in the basket. What happened?

PS: None of the fish were eaten, lost, or thrown back.

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?