PSLE
Abi had to sew 159 windbreakers. She sewed 6 windbreakers each day from Monday to Friday and 13 each day on Saturday and Sunday. Starting on a Thursday, on which day of the week did Abi finish sewing all the windbreakers? Give your answer in number. (Eg Mon = 1)
Number of weekdays that Abi sewed on the first week = 2

Number of windbreakers that Abi completed for from Thursday to Sunday on the first week
= 2 x 6 + 2 x 13 
= 12 + 26
= 38

Number of windbreakers left to sew
= 159 - 38
= 121

Number of windbreakers that Abi could sew per week from second week onwards
= 5 x 6 + 2 x 13
= 30 + 26
= 56

Number of weeks that Abi needed to sew 121 windbreakers
= 121 ÷ 56
= 2 r 9

Number of days that Abi needed to sew 9 windbreakers
= 9 ÷ 6
= 1 r 3

Abi needed 1 more day to finish sewing the remaining 3 windbreakers.

Day of the week that Abi completed her sewing
= 1 + 1
= 2 (Tue)

Answer(s): 2