Questions

From Worst to Best

16 P5.ST.JC.18121052

Level 3
A coin bank contains some twenty-cent and fifty-cent coins in the ratio of 2 : 5.
When 10 fifty-cent coins are taken out and
exchanged with some twenty-cent coins of the same value,
the ratio became 8 : 9.
Find the sum of money in the coin box in dollars.

3 m

Attempt

17 P5.ST.JC.18121142

Level 2
Adam has 200 red stickers, blue stickers and green stickers.
40% of the stickers are blue.
There are 10 more red stickers than green stickers.

How many green stickers are there?
How many less red stickers than blue stickers?

2 m

Attempt

Percent of a set Percent to units More than or less than Units & parts

18 P5.ST.JC.18121143

Level 3
Adam has 200 red stickers, blue stickers, yellow stickers and green stickers.
20% of the stickers are red.
40% of the stickers are blue.
The rest are yellow and green stickers.
There are 10 more yellow stickers than green stickers.

How many green stickers are there?
How many less red stickers than blue stickers?

2 m

Attempt

Percent of a set Percent to units More than or less than Units & parts

19 P5.RD.NK.23021727

Level
In a stationery kiosk, a box of markers costs thrice as much as a guidebook. Mrs Yong spent ¹₄ of her money to buy 2 boxes of markers. She then spent ⁴₇ of her remaining money to buy some guidebooks and had $21.60 left. How much does each guidebook cost?

4 m

Attempt

F Addition & subtraction Fraction to units Money Times as many Remainder concept Working backwards Units & parts Substitution

20 P5.ST.JC.18121168

Level 3
Adam has some blue stickers and red stickers.
If Adam receives another 60 blue stickers,
the blue stickers will be 80% as many as the red stickers.
If Adam receives another 300 red stickers,
the blue stickers will be 20% as many as the red stickers.