QUES: All times are GMT The time now is 1230 PM

correct the punctuation.

CORRECTED: All times are GMT. The time now is 12:30 PM .

QUES: Tip Incorrect ACI file association errors can be a symptom of other underlying issues within your Windows operating system

correct the punctuation.

CORRECTED: Tip: Incorrect ACI file association errors can be a symptom of other underlying issues within your Windows operating system.

QUES: That was the problem of the attraction of an ellipsoid which was first studied in depth by Ivory whose solution was later generalised by Poisson Amsler extended the theorems of both Ivory and Poisson on this topic

correct the punctuation.

CORRECTED:
That was the problem of the attraction of an ellipsoid, which was first studied in depth by Ivory whose solution was later generalised by Poisson . Amsler extended the theorems of both Ivory and Poisson on this topic.