PSLE
Min had to sew 130 vests. She sewed 7 vests each day from Monday to Friday and 14 each day on Saturday and Sunday. Starting on a Thursday, on which day of the week did Min finish sewing all the vests? Give your answer in number. (Eg Mon = 1)
Number of weekdays that Min sewed on the first week = 2

Number of vests that Min completed for from Thursday to Sunday on the first week
= 2 x 7 + 2 x 14 
= 14 + 28
= 42

Number of vests left to sew
= 130 - 42
= 88

Number of vests that Min could sew per week from second week onwards
= 5 x 7 + 2 x 14
= 35 + 28
= 63

Number of weeks that Min needed to sew 88 vests
= 88 ÷ 63
= 1 r 25

Number of days that Min needed to sew 25 vests
= 25 ÷ 7
= 3 r 4

Min needed 1 more day to finish sewing the remaining 4 vests.

Day of the week that Min completed her sewing
= 3 + 1
= 4 (Thu)

Answer(s): 4