PSLE A shop had a number of mobile phones for sale. After selling 12 of them in the morning and
27 of the remainder in the afternoon, it was left with
12 of the mobile phones. How many mobile phones were sold altogether?
Morning |
Remainder |
|
Afternoon |
Left |
12 |
2x1 |
5x1 |
1x5 |
1x5 |
3 u |
2 u |
5 u |
Fraction of the remainder left
= 1 -
27 =
57 5x17x1 Remainder =
1x52x5 Total
57 Remainder =
510 Total
Number of mobile phones sold in the morning
= 5 u - 2 u
= 3 u
3 u = 12
1 u = 12 ÷ 3 = 4
Number of mobile phones sold in the afternoon
= 2 u
= 2 x 4
= 8
Answer(s): 8