Questions

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421 P5.ST.JC.18121177

Level 3
In a school, there is a total of 400 people.
30% are adults.
The rest are children.
The number of boys and girls is in the ratio of 2 : 5.

What percentage of the people are boys?
How many girls are there?

3 m

Attempt

Ratio to units Finding percent Percent of a set Percent to units Combined repeated identity Remainder concept Units table

422 P5.RA.NK.22122919

Level 3
Last Saturday, Jack withdrew an equal number of $10-notes and $50-notes from the bank. After spending 58 pieces of $10-notes and 10 pieces of $50-notes, the ratio of the remaining $10-notes to $50-notes became 2 : 5.

How many $10-notes had he left?
What was the total value of the notes which Jack withdrew from the bank?

4 m

Attempt

Ratio to units Money Equal stage before All change Sets Units equations Units table

423 P6.RD.TL.16010126

Level 3
Queenie baked 390 cookies and cupcakes. After she gave 0.3 of the cookies and 0.4 of the cupcakes to her friends, she was left with an equal number of cookies and cupcakes. How many cookies had she left?

4 m

Video Attempt

Decimal to units Equal stage after All change Units table Units manipulation

424 P5.RA.JC.17083328

Level 3
There were 360 males and 400 females queueing up for a fan meeting. The ratio of the number of males to the number of females who left the queue was in the ratio 1 : 2. As a result, the ratio of the number of females became four times as many as the number of males who remained in the queue. How many people left the queue?

4 m

Attempt