PSLE A shop had a number of hard drives for sale. After selling 45 of them in the morning and
512 of the remainder in the afternoon, it was left with
13 of the hard drives. How many hard drives were sold altogether?
Morning |
Remainder |
|
Afternoon |
Left |
45 |
5x1 |
7x1 |
2x7 |
1x7 |
9 u |
5 u |
7 u |
Fraction of the remainder left
= 1 -
512 =
712 7x112x1 Remainder =
1x73x7 Total
712 Remainder =
721 Total
Number of hard drives sold in the morning
= 14 u - 5 u
= 9 u
9 u = 45
1 u = 45 ÷ 9 = 5
Number of hard drives sold in the afternoon
= 5 u
= 5 x 5
= 25
Answer(s): 25