The Department of Mathematics, Government College Women University Faisalabad organized an International Webinar entitled Numerical Semi-group Rings and the Money Exchange Problem on 16th February 2022 under the Patronage of Prof. Dr. Robina Farooq, Vice Chancellor GCWUF. It was a day webinar to develop the collaboration with International mathematicians so that they can share their knowledge with us. Dr. Zil-I-Huma Nazli, Director Academics/ Coordinator Science and Technology and Dr. Aasma Khalid, Director QEC along with all faculty members and students of Department of mathematics attended the webinar. The Webinar ceremony commenced with recitation of verses from Holy Quran. Dr. Asia Rauf, Incharge of department of mathematics, GCWUF presented the welcome note. Dr. Zil-I-Huma Nazli, made a welcome speech for the guest speaker and researchers in the webinar. Dr. Asia Rauf, convener of the ceremony introduced keynote speaker, Prof. Dr. Juergen Herzog to the participants. He is one the most accomplished researcher in the modern development of commutative algebra. He has more than 300 research papers and cited by 16507 times. Professor Herzog, discussed the coin exhange problem of Frobenius, numerical semi groups and the theorem of Sylvester, Gap and non-gaps and symmetric numerical semigroups, gluing and the theorem of Johnson, Brauer and Shockley in his lecture. He explained the conjecture of Wilf which is widely open to prove. In the end there was a note of thanks by Dr. Asia Rauf. All the participants appreciated the energetic efforts of Dr. Asia Rauf for conducting the International Webinar in mathematics department GCWUF under the kind patronage of Worthy Vice Chancellor Prof. Dr. Robina Farooq.