On 04/12/2013 09:53, Martin Brown wrote:
On 04/12/2013 06:54, Dave Baker wrote:

"John Rumm" wrote in message
o.uk...

http://www.telegraph.co.uk/education...interview.html


(100%, but I did have to draw a picture for one!)

Yes, the horizon calculation I assume. The 4 digit multiplication seemed
utterly pointless other than to test a small child. I did it with pen
and paper and assume that was what they meant by no calculators rather
than having to do it in ones head which would have taken a bit longer.

Then you would already have failed. It is a pattern matching test to
spot that you can short circuit any mental arithmetic by spotting

(4000-20).(4000+20) = 4000^2 - 20^2

It helped that as a cylinder head airflow specialist I already knew the
density of air by heart but I suppose that most people have no idea and
I presume in a real test you wouldn't be allowed to look that up so I
guess that one could stump a lot of people.

Not for scientists 1 mol = 24.3L at STP ~ 1kg/m^3

Isn't that RTP? 22.4l for STP?

SteveW