PSLE A shop had a number of hard drives for sale. After selling 70 of them in the morning and
58 of the remainder in the afternoon, it was left with
16 of the hard drives. How many hard drives were sold altogether?
Morning |
Remainder |
|
Afternoon |
Left |
70 |
5x1 |
3x1 |
5x3 |
1x3 |
10 u |
5 u |
3 u |
Fraction of the remainder left
= 1 -
58 =
38 3x18x1 Remainder =
1x36x3 Total
38 Remainder =
318 Total
Number of hard drives sold in the morning
= 15 u - 5 u
= 10 u
10 u = 70
1 u = 70 ÷ 10 = 7
Number of hard drives sold in the afternoon
= 5 u
= 5 x 7
= 35
Answer(s): 35