Devansh Sehta attended a a six-week summer program at Boston University designed to encourage strongly motivated high school students to explore in depth the creative world of mathematics in a supportive community research mathematicians, and visiting scientists. This program is for mathematically gifted high school students who are carefully selected from across the world. He was among the 12 students from India who were selected for this program. Devansh undertook two advanced seminars this summer: Cryptography taught by PROMYS alum Professor Li-Mei Lim (Boston University) and Galois Theory taught by PROMYS alum Professor David Speyer (University of Michigan). Devansh's research project was "Expansions of Natural Numbers and of Real Numbers" mentored by PROMYS alum Dr. Michael King (Bowdoin College).