PSLE A shop had a number of mobile phones for sale. After selling 20 of them in the morning and
14 of the remainder in the afternoon, it was left with
13 of the mobile phones. How many mobile phones were left?
Morning |
Remainder |
|
Afternoon |
Left |
20 |
1x1 |
3x1 |
2x3 |
1x3 |
5 u |
1 u |
3 u |
Fraction of the remainder left
= 1 -
14 =
34 3x14x1 Remainder =
1x33x3 Total
34 Remainder =
39 Total
Number of mobile phones sold in the morning
= 6 u - 1 u
= 5 u
5 u = 20
1 u = 20 ÷ 5 = 4
Number of mobile phones left
= 3 u
= 3 x 4
= 12
Answer(s): 12