Q&A - PSLE Math
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R and D had $1250 altogether.After R spent 80% and D spent 40%,D had twice as much money left as R.Find the amount of money D had in the end.
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J takes 6 hours to paint a house.If D helps him,they would take 4 hours.How long will D take to paint the house himself?
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Thanks tianzhu
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Tony is 38 years old.Kelly is 22 years old.How many years ago was Kellys age 1/3 of Tonys age?
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J and E each have some marbles.If J gives 36 marbles to E,both of them will have the same number of marbles.If E gives 12 marbles to J,the number of marbles that J has to the number of marbles E has will be in the ratio 5:1.How many marbles does each girl have?
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shruthi:
Tony is 38 years old.Kelly is 22 years old.How many years ago was Kellys age 1/3 of Tonys age?
14 years ago k will be 22-14=8 t was 38-14=24
8 is 1/3 of 24.
And: 14 years ago. -
Verysuperkiasu:
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ck123:
Thanks tianzhu
Hi
Good Morning.
You're welcome.
Best wishes -
Verysuperkiasu:
Hi
Thank you so much, tianzhu!
Good Morning.
You're welcome.
Best wishes -
shruthi:
R and D had $1250 altogether.After R spent 80% and D spent 40%,D had twice as much money left as R.Find the amount of money D had in the end.
Hi
You may use MD.
Start with D in the end.
D
Left ----- 6 units (60%)
Spent ----- 4 units (40%)
R
Left ------ 3 units (20%) ----- D had twice as much money left as R.
Spent ------ 12 units (80%)
25 units ------ 1250
1 unit ------ 50
In the end, D ------ 6 units ------ 6*50 ------ 300
Best wishes