PSLE A shop had a number of hard drives for sale. After selling 12 of them in the morning and
411 of the remainder in the afternoon, it was left with
12 of the hard drives. How many hard drives were sold altogether?
Morning |
Remainder |
|
Afternoon |
Left |
12 |
4x1 |
7x1 |
1x7 |
1x7 |
3 u |
4 u |
7 u |
Fraction of the remainder left
= 1 -
411 =
711 7x111x1 Remainder =
1x72x7 Total
711 Remainder =
714 Total
Number of hard drives sold in the morning
= 7 u - 4 u
= 3 u
3 u = 12
1 u = 12 ÷ 3 = 4
Total number of hard drives sold
= 7 u
= 7 x 4
= 28
Answer(s): 28