Hee-hee! I like it!

I'm baffled by the 5 o'clock one though.

How does the square-root of 9! = 6 as I read it; or come to that the square-root of 8! = 5?

Nor does it work by the factorial of the square-root of nine.

Ah! you'd need a calclator to turn that into real time

Nice one Noel

Tug

If you got 601.3952191045344 for 5O'Clock, join my club.

Also, am I right in saying that the digits of the hours expressed in seconds always add up to 9?

e.g.:

1AM = 3600s so 3+6+0+0 = 9

4AM = 14400 so 1+4+4+0+0 = 9

9AM = 32400s so 3+2+4+0+0 = 9

11AM = 39600s so 3+9+6+0+0 = 18 & 1+8 = 9

Bound to be useful for something. Is there a prize?

Dave

I'm sure there must be a much simpler expression for the 9 o'clock position, but I can't imagine what…

.

I suppose it’s fair … given that the ‘bang’ is outside the sqrt sign

MichaelG.

Probably been won almost as soon as we started using base 10 with arabic/indian numerals Dave, as the sum of the digits of any multiple of 9 is always a multiple of 9, and 3600 = 400 x 9.

I just checked and the same thing seems to work in other bases such as Hex, so that the digits of multiples of F add up to multiples of F. I'm beginning to understand why I was put in the applied maths stream at school as this sort of thing just confuses me.

Brian G

Edited By Brian G on 24/08/2021 20:37:57

Hi, this is how I did it on my calculator.

This is the only way I could get it on my calculator with any brackets, any other combination of brackets gave a wrong answer or a system error.

Regards Nick.

Edited By Nicholas Farr on 24/08/2021 21:37:38

Duncan – it's also a big river. I'm assuming we aren't allowed to mention the actual website?

Rob

The search phrase "Math Clock buy uk" throws up multiple retailers and many more variations.

pgk

Yep, I thought that, too. After all it is about the number 9. KISS principle and all that.

Now set about the minute hand?!

Duncan, Ama-zing or -zon.