What strategy would be the best to solve this problem?
 To get into shape, Miles ran for 1 minute on Monday, 3 minutes on Tuesday, 6
 minutes on Wednesday, and 10 minutes on Thursday. If he continues, how
 many minutes will Miles run on Sunday?
 OA) guess, check and revise
 OB) work backwards
 OC) use a formula
 OD) look for patterns