PSLE
Nora had to sew 142 windbreakers. She sewed 4 windbreakers each day from Monday to Friday and 8 each day on Saturday and Sunday. Starting on a Thursday, on which day of the week did Nora finish sewing all the windbreakers? Give your answer in number. (Eg Mon = 1)
Number of weekdays that Nora sewed on the first week = 2

Number of windbreakers that Nora completed for from Thursday to Sunday on the first week
= 2 x 4 + 2 x 8 
= 8 + 16
= 24

Number of windbreakers left to sew
= 142 - 24
= 118

Number of windbreakers that Nora could sew per week from second week onwards
= 5 x 4 + 2 x 8
= 20 + 16
= 36

Number of weeks that Nora needed to sew 118 windbreakers
= 118 ÷ 36
= 3 r 10

Number of days that Nora needed to sew 10 windbreakers
= 10 ÷ 4
= 2 r 2

Nora needed 1 more day to finish sewing the remaining 2 windbreakers.

Day of the week that Nora completed her sewing
= 2 + 1
= 3 (Wed)

Answer(s): 3