PSLE A shop had a number of hard drives for sale. After selling 105 of them in the morning and
19 of the remainder in the afternoon, it was left with
13 of the hard drives. How many hard drives were left?
Morning |
Remainder |
|
Afternoon |
Left |
105 |
1x1 |
8x1 |
2x8 |
1x8 |
15 u |
1 u |
8 u |
Fraction of the remainder left
= 1 -
19 =
89 8x19x1 Remainder =
1x83x8 Total
89 Remainder =
824 Total
Number of hard drives sold in the morning
= 16 u - 1 u
= 15 u
15 u = 105
1 u = 105 ÷ 15 = 7
Number of hard drives left
= 8 u
= 8 x 7
= 56
Answer(s): 56