PSLE A shop had a number of hi-fi systems for sale. After selling 56 of them in the morning and
27 of the remainder in the afternoon, it was left with
13 of the hi-fi systems. How many hi-fi systems were sold altogether?
Morning |
Remainder |
|
Afternoon |
Left |
56 |
2x1 |
5x1 |
2x5 |
1x5 |
8 u |
2 u |
5 u |
Fraction of the remainder left
= 1 -
27 =
57 5x17x1 Remainder =
1x53x5 Total
57 Remainder =
515 Total
Number of hi-fi systems sold in the morning
= 10 u - 2 u
= 8 u
8 u = 56
1 u = 56 ÷ 8 = 7
Number of hi-fi systems sold in the afternoon
= 2 u
= 2 x 7
= 14
Answer(s): 14