PSLE A shop had a number of mobile phones for sale. After selling 144 of them in the morning and
512 of the remainder in the afternoon, it was left with
14 of the mobile phones. How many mobile phones were sold altogether?
Morning |
Remainder |
|
Afternoon |
Left |
144 |
5x1 |
7x1 |
3x7 |
1x7 |
16 u |
5 u |
7 u |
Fraction of the remainder left
= 1 -
512 =
712 7x112x1 Remainder =
1x74x7 Total
712 Remainder =
728 Total
Number of mobile phones sold in the morning
= 21 u - 5 u
= 16 u
16 u = 144
1 u = 144 ÷ 16 = 9
Total number of mobile phones sold
= 21 u
= 21 x 9
= 189
Answer(s): 189