Questions

From Worst to Best

261 P5.ST.JC.18121123

Level 3
The ratio of the number of blue stickers to red stickers is 5 : 2.
After Adam buys another 20 red stickers and gives away 10 blue stickers,
the ratio becomes of the number of blue stickers to red stickers is 3 : 2.
How many stickers does Adam have now?

3 m

Attempt

262 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

Ratio to units Proportional exchange Units table Units & parts Elimination

263 P6.PC.JC.23100209

Level 2 PSLE
Esmee spent 80% of her money on a dress. She spent 40% of the remainder on a watch. After that, she had $5.40 left. How much money did Esmee have at first?

3 m

Attempt

Percent of a whole Remainder concept Branching F Multiplication Units table

264 P5.RD.JC.17083142

Level 3
Last year, there were 48 members in a school music club. The number of girls was ³₅ the number of boys.

What percentage of the members were girls last year?
This year, 4 boys left the club and 6 girls joined the club. What percentage of the members are girls this year?

4 m

Attempt

Finding percent Percent of a set Fraction to percent Fraction to units Times as many All change Units table

265 P6.RD.JC.21022801

Level 3
The number of girls in the dance club was ²₅ the number of boys in it. The number of girls in the computer club was ⁶₇ the total number of students in it. The total number of students in the dance club was ¹₂ the total number of students in the computer club. Find the ratio of the number of boys in the computer club to the number of boys in the dance club.

3 m

Attempt

Fraction to units Finding ratio Units manipuation Units table

266 P6.PC.TL.16010103

Level 3
Some adult passengers are on a coach. If 25 tourists alight from the coach, the percentage of locals will increase from 15% to 40%. How many passengers are there in the coach?

3 m

Video Attempt

Percent change to Percent to units Percent of different bases Unchanged quantity Units table

267 P5.FR.JM.17083091

Level 2
Mr Seetoh paid a total of $20 for one adult and two child tickets. If a child ticket was ³₄ of the price of an adult ticket, what was the price of an adult ticket?

2 m

Attempt

Fraction to units Money Number x value Units table

268 P6.PC.TL.16010102

Level 3
In a box, there are some mangosteens and lemons. If 80 more lemons are put into the box, the percentage of mangosteens will decrease from 70% to 30%. How many mangosteens are there in the box?

3 m

Video Attempt

Percent change to Percent to units Percent of different bases Unchanged quantity Units table

269 P6.PC.TL.16010101

Level 3
A store owner had 505 kg of fresh honeydews. The honeydews contained 60% water when fresh. One week later, there was only 50% water left in the honeydews. What was the mass of the honeydews one week later?

3 m

Attempt

Percent change to Percent to units Percent of different bases Mass Unchanged quantity Units table

270 P6.AP.TL.17090761

Level 2
The figure, not drawn to scale, is made up of 3 circles. The ratio of the area of the smallest circle to the largest circle is 2 : 5 while the shaded area is ³₇ of the unshaded area. What is the ratio of the shaded area to the area of the smallest circle?