PSLE A shop had a number of stereo systems for sale. After selling 68 of them in the morning and
18 of the remainder in the afternoon, it was left with
16 of the stereo systems. How many stereo systems were left?
Morning |
Remainder |
|
Afternoon |
Left |
68 |
1x1 |
7x1 |
5x7 |
1x7 |
34 u |
1 u |
7 u |
Fraction of the remainder left
= 1 -
18 =
78 7x18x1 Remainder =
1x76x7 Total
78 Remainder =
742 Total
Number of stereo systems sold in the morning
= 35 u - 1 u
= 34 u
34 u = 68
1 u = 68 ÷ 34 = 2
Number of stereo systems left
= 7 u
= 7 x 2
= 14
Answer(s): 14