# Monthly Archives: March 2009

## A combinatorial identity

I came across the following identity today. $\displaystyle{1 \choose k} + {2 \choose k} + \ldots + {99 \choose k} = {100 \choose k+1}$ It is not exactly difficult to establish if one uses the Pascal relation repeatedly. [tex] … Continue reading

Posted in Combinatorics | 2 Comments

## 99104 job losses predicted

The newspaper (26 Feb) reported an economist made this prediction. That’s an alarming figure, but not because the economy is so bad, rather the mathematics is so bad. Can anyone without divine powers get that kind of accuracy? So this … Continue reading