Adam has some money.
Adam spends $310 on some marbles and
20% of the remainder on some stickers.
In the end, he has
710 of the total amount left.
- How much does Adam have at first?
- How much more does Adam spend on stickers than on marbles?
Marbles |
Remainder |
$310 |
Stickers |
Left |
|
1 x 7 |
4 x 7 |
3 x 4 |
7 x 4 |
5 u |
7 u |
28 u |
(a)
20% =
20100 =
15 Remainder
Total : Spent : Left
5 : 1 : 5 - 1
5 : 1 : 4
45 of the remaining amount is the same as
710 of the total amount.
Amount that Adam has at first = 10 u
Amount that Adam spends on the marbles
= 12 u - 7 u
= 5 u
5 u = 310
1 u = 310 ÷ 5 = 62
Amount that Adam has at first
= 10 u
= 10 x 62
= $620
(b)
Amount that Adam spends on stickers
= 7 u
= 7 x 62
= $434
Amount that Adam spends more on stickers than on marbles
= 434 - 310
= $124
Answer(s): (a) $620; (b) $124