## Squaring numbers near 50

Last week I mentioned about the YouTube video about this problem which is said to be a Math Olympiad problem. The solution offered was also to use the difference of two squares formula: 2^18 – 1 = (2^9 + 1)(…

Two weeks ago, I found YouTube videos discussing this problem and a similar one which is said to be a Math Olympiad problem, “20^18 – 1”. The approach to solving the problems, as shown in both videos, are basically the…

This question was given In the intermediate category of the 2nd Philippine National Vedic Math Olympiad last 2021 were participants are required to answer 50 questions in 1 hour. Since all the choices are whole numbers, we can assume that…