16. Nurul and Peili went shopping together with a total sum of $60. Nurul spent twice as much as Peili. The amount Peili had left was $7 more than what she had spent. She had twice as much money left as Nurul.
(a) How much money did Peili spend?
(b) How much money did Nurul have at first?
N [][][][] [][3.50] }
P [][] [][][ 7 ] } $60
9 u --> 60 - 7 - 3.50 = 49.50
1 u --> 49.50 / 9 = 5.50
2 u --> 2 x 5.50 = $11
a) Peili spent $11.
5 u --> 5 x 5.5 = 27.50
27.50 + 3.50 = $31
b) Nurul had $31 at first.
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ans : a) $16.50
ReplyDeleteb) $20
Either this question is wrong or the model drawn is wrong. Nurul spent twice, shouldn't it be 4u + 14?
ReplyDeleteHighlighted are the amounts spent.
ReplyDeleteThose not highlighted are the amounts remaining.
i retract comment #1 which posted a set of different answers which are wrong due to my misreading (read Peili as spending twice). The answers posted by the author are correct :D
ReplyDeleteAs appeared in PSLE 2010 exam:
ReplyDeleteNurul and Peili went shopping together with a total sum of $60. Nurul spent twice as much as Peili. The amount Peili had left was $7 more than what she had spent. She had twice as much money left as Nurul.
(a) How much money did Peili spend?
(b) How much money did Nurul have at first?
How to do?
ReplyDeleteIdk
Delete