Koloi ya ga Jon e tlhoka go tlhabololwa morago ga dikilometara di le 1000.  O kgweetsa dikilometara di le 100 ka letsatsi mo kgweding ya malatsi a le 30.  O tlhoka go tlhabololwa ga koloi ga kae mo nakong eo?

John drinks a bottle of water every half hour.  A normal sudoku puzzle takes him 45 minutes.  An extreme sudoku takes 4 times that long.  How many bottles of water does he drink in that time?
O kgweetsa dikilometara di le 100*30=<<100*30=3000>>3000 
Ka jalo, o tlhoka go tlhabololwa ga koloi ga 3000/1000=<<3000/1000=3>>3 
#### 3 

He drinks a bottle of water every 60/2=<<60/2=30>>30 minutes
It takes him 45*4=<<45*4=180>>180 minutes to solve an extreme sudoku
So he drinks 180/30=<<180/30=6>>6 bottles in that time
#### 6