PSLE A shop had a number of computers for sale. After selling 30 of them in the morning and
13 of the remainder in the afternoon, it was left with
13 of the computers. How many computers were left?
Morning |
Remainder |
|
Afternoon |
Left |
30 |
1x1 |
2x1 |
2x2 |
1x2 |
3 u |
1 u |
2 u |
Fraction of the remainder left
= 1 -
13 =
23 2x13x1 Remainder =
1x23x2 Total
23 Remainder =
26 Total
Number of computers sold in the morning
= 4 u - 1 u
= 3 u
3 u = 30
1 u = 30 ÷ 3 = 10
Number of computers left
= 2 u
= 2 x 10
= 20
Answer(s): 20