Imam Ali's Mathematical Brilliance

Imam Ali bin Abi Thalib (karramallahu wajhah) was endowed with a quick, sharp, incisive, mathematical mind. Here are a few interesting stories in which Imam Ali's mathematical brilliance revealed itself.

Whole Number and not a Fraction

One Day a Jewish person came to Imam Ali (krw), thinking that since Imam Ali thinks he is too smart, I'll ask him such a tough question that he won't be able to answer it and I'll have the chance to embarrass him in front of all the Arabs.

He asked "Imam Ali, tell me a number, that if we divide it by any number from 1-10 the answer will always come in the form of a whole number and not as a fraction."

Imam Ali (krw.) looked back at him and said, "Take the number of days in a year and multiply it with the number of days in a week and you will have your answer."

The Jewish person got astonished but as he was a polytheist (Mushrik), he still didn't believe Imam Ali (krw.). He calculated the answer Imam Ali (krw.) gave him.

To his amazement he came across the following results:
- The number of Days in a Year = 360 (in Arab)
- The Number of Days in a Week = 7
- The product of the two numbers = 360x7=2520

Now...

2520 ÷ 1 = 2520
2520 ÷ 2 = 1260
2520 ÷ 3 = 840
2520 ÷ 4 = 630
2520 ÷ 5 = 504
2520 ÷ 6 = 420
2520 ÷ 7 = 360
2520 ÷ 8 = 315
2520 ÷ 9 = 280
2520 ÷ 10= 252
http://www.kitabklasik.co.cc/2009/06/imam-alis-mathematical-brilliance.html