24 Apr
2015
24 Apr
'15
5:11 p.m.
Just looked at this birthday problem again online again and noticed the first sentence is: ----- Singapore usually comes top, or nearly top, of the international rankings in primary maths performance. ----- I think I know who is to blame for this, and he is on math-fun. Any guesses? --Dan
On Apr 24, 2015, at 11:58 AM, Alex Bellos <alexanderbellos@gmail.com> wrote:
Cheryl’s birthday logic problem last week in the Guardian