# Add new comment

A new machine learning framework provides doctors with a reliable tool to help diagnose Alzheimer's disease early.

What do we know about monkeypox, what do we not know, and what efforts are going into modelling it?

The COVID-19 emergency resulted in some amazing mathematical collaborations.

Here's a simple game at which a human can out-fox even the cleverest algorithm.

The INI is celebrating its 30th birthday. What is it and what is it do for maths and mathematicians?

Kaprekar’s constant 6174 can be

considered to be a disguised form

of the silver ratio (that is, the

reciprocal of the golden ratio).

Rationale:

There are 9990 4-digit numbers

having at least 2 distinct digits.

The location of Kaprekar’s

constant among them is, to

4 decimal places, the silver

ratio deep among them,

the silver ratio being the

reciprocal of the golden ratio

(not to be confused with

the silver mean, also known

as the silver ratio).

That is to say, 6174/9990 is,

to 4 decimal places, 0.6180.

So, every 4-digit number, at

the beginning of the Kaprekar

process, shouts out “Hi-Yo Silver!”