Stockbroker Mr. Get U. Rich calculates his profit % on cost price so his cost price is $1000/1.25= $800 and has thus made a profit of $200.
Stockbroker Mr. U. R. Clever has calculated his profit % on selling price, so his cost price should be $1000*(1-.25)= $ 750, hence his profit is $ 250, so in reality Stockbroker Mr. U. R. Rich has made more money for his client!
Jerry beats Tom (Again!) Jerry needs to run 6 meters, (added the extra second before the sofa), while Tom has to run 9.5 meters (added the seconds taken to wriggle out) 6/1 = 6 seconds 9.5/1.5 = 6 and 1/3 seconds. Jerry will beat Tom by half a meter or 1/3 of a second to Jerry's hole.