You may be wondering why I’ve called my site OneFiveThree. The reason is the two areas I expect to feature most often – Christian faith and numbers. OneFiveThree says a lot about them. Numbers 153 is a particularly interesting number. Here are a few of its features. 153 is a narcissistic number – you get … Continue reading Why onefivethree?
Author: Ian Naismith
My name's Ian, and I'm a Christian, husband, father, grandfather, pensions geek and numbers freak. My day job is as a church manager, and I moonlight writing about pensions. Alongside that I chair a Christian charity working among disadvantaged young people, do a bit of preaching and study family history. I also read extensively.
153 – a triangular number
A triangular number is one that can be represented by dots arranged in a triangle, where each row has one fewer dots than the one below it. The layout can be as a right-angled triangle, or as an equilateral one as illustrated on the left. Mathematically, the nth triangular number is the total of the … Continue reading 153 – a triangular number
153 – A narcissistic number
153 is a narcissistic number because 13 +53 +33 = 1 + 125 + 27 = 153. In general, a narcissistic number with k digits is one where the sum of raising each if its digits to the power k gives you the original number. So, for example, 84 + 24 + 04 + 84 … Continue reading 153 – A narcissistic number
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