I Like Math and Science

@black4white why does ice water make a difference? All the ice cubes have to melt to complete the question.

Well in your question you have ice and water to the brim tip top so ice water in that glass or am I reading something wrong?

@black4white the melting ice will make ice water anyway. Do you think the water will overflow the glass?

@turbineman40 yes it will as previously stated...when the ice melts the water slowly over flows

@black4white see Spaceblaster answer below.
Ask your science teacher also

@black4white the water/ice has no way to increase in volume therefore the glass will not overflow.

@turbineman40 awesome I like brain teasers like that pretty awesome

@black4white yes if you fill a glass with water then add ice yes it will overflow but the question states that you fill the glass with ice first then add water , since the ice creates a displacement of the water the melting ice just fills in the place that it took as a solid.