PSLE A shop had a number of hard drives for sale. After selling 207 of them in the morning and
512 of the remainder in the afternoon, it was left with
15 of the hard drives. How many hard drives were sold altogether?
Morning |
Remainder |
|
Afternoon |
Left |
207 |
5x1 |
7x1 |
4x7 |
1x7 |
23 u |
5 u |
7 u |
Fraction of the remainder left
= 1 -
512 =
712 7x112x1 Remainder =
1x75x7 Total
712 Remainder =
735 Total
Number of hard drives sold in the morning
= 28 u - 5 u
= 23 u
23 u = 207
1 u = 207 ÷ 23 = 9
Total number of hard drives sold
= 28 u
= 28 x 9
= 252
Answer(s): 252