PSLE
Zoe had to sew 146 blazers. She sewed 7 blazers each day from Monday to Friday and 11 each day on Saturday and Sunday. Starting on a Monday, on which day of the week did Zoe finish sewing all the blazers? Give your answer in number. (Eg Mon = 1)
Number of weekdays that Zoe sewed on the first week = 5

Number of blazers that Zoe completed for from Monday to Sunday on the first week
= 5 x 7 + 2 x 11 
= 35 + 22
= 57

Number of blazers left to sew
= 146 - 57
= 89

Number of blazers that Zoe could sew per week from second week onwards
= 5 x 7 + 2 x 11
= 35 + 22
= 57

Number of weeks that Zoe needed to sew 89 blazers
= 89 ÷ 57
= 1 r 32

Number of days that Zoe needed to sew 32 blazers
= 32 ÷ 7
= 4 r 4

Zoe needed 1 more day to finish sewing the remaining 4 blazers.

Day of the week that Zoe completed her sewing
= 4 + 1
= 5 (Fri)

Answer(s): 5