## Squaring numbers ending in 9 or 1.

In our previous posts, we have discussed squaring numbers ending in 5, squaring numbers near powers of 10 and numbers near 50, 500 etc. We will now discuss squaring numbers ending in 9 or 1. If a is any number…

In our previous posts, we have discussed squaring numbers ending in 5, squaring numbers near powers of 10 and numbers near 50, 500 etc. We will now discuss squaring numbers ending in 9 or 1. If a is any number…

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…

What this question given in the primary category of the 1st International Vedic Mathematics Olympiad in September 11, 2021 really requires is to find out the square root of of 5625. Anyone who is familiar with Vedic Mathematics can answer…

Our previous Math Tip deals with recognizing numbers divisible by 11. The next logical lesson should be how to determine the remainder when a number is divided by 11. This is the subject of this question, which was given the…

A number is divisible by 11 if the alternating sum of the digits is 0 or a multiple of 11. This also means that the difference between the sum of the odd-placed digits and the sum of the even-placed digits…

In our previous posts we discussed short methods of multiplying number pairs having identical starting digits and their “final digits add up to 10”. We first applied it to squaring numbers ending in 5 (5 + 5 = 10) and…

Congratulations to high school teachers Crisostomo Velasco Jr, Francisco Pelagio and Victoria Dimasin and elementary student Christ Alexan Sy for passing the Level III assessment given by the Institute for the Advancement of Vedic Mathematics through MATH-Inic Philippines last June…