# Think – Today: Five hundred and thirty-eight (538)?

by Anura Guruge

#### Why will five hundred and thirty-eight (538) be the most important number in the United States next week?

Think first, then research, then THINK again. Think for the pleasure of thinking.

Yesterday’s ‘Think’360° in a circle. It has to do with the first (and most important) circle that our ancient ancestors, around 4,000 B.C. (or even earlier) had to contend with — and QUANTIFY. The circular orbit of the Sun (with the then belief that the Sun circled the Earth). 360° comes from the 365-days in a year. They had worked out, through very diligent observations of the seasons and stars (particularly the rising of the ‘Dog Star’ ‘Sirius’) that a year was around “360” days. I actually think they had nailed down the 365-days quite early on. BUT, in my opinion, they ROUNDED the 365 to the EASIER ‘360‘. 365 is not very divisible — and our early ancestors, thanks to sharing food, knew how to DIVIDE. Other than ‘1’ and ‘itself’, 365 only has two divisors: 5 & 73. You can’t divide it by 2, 4, 5 or 10. And then there is 360 which is hugely divisible: 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120 & 180. BINGO! Did you like that?

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by Anura Guruge

## 3 thoughts on “Think – Today: Five hundred and thirty-eight (538)?”

1. jdschok

I remembered that 360 had something to do with astronomy and the Greeks from what I learned in school, just couldn’t remember the full thing, should have paid more attention in school 😕
Thanks for renewing my knowledge. Also 360 is used daily in the calculation of per annum interest in many financial transactions.

1. Anura Guruge Post author

THANK YOU. I did NOT know that last part … ” 360 is used daily in the calculation of per annum interest in many financial transactions”. That is neat. I guess because it was easier in the old days. before calculators, to use 360 rather than 365.