Questions

From Best to Worst

61 P5.ST.JC.18121157

Level 3
Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 20% to 60.
The number of red stickers is increased by 30% to 65.

How many stickers are there at first?
How many stickers are there in the end?

3 m

Attempt

62 P5.ST.JC.18121158

Level 3
Adam has some blue stickers and red stickers.
The number of blue stickers is decreased by 20% to 160.
The number of red stickers is decreased by 30% to 70.

How many stickers are there at first?
How many stickers are there in the end?

3 m

Attempt

Percent of a set Percent change by Percent of different bases All change Units method

63 P6.RD.JC.19082902

Level 3
Fabian, Gilbert and Henry had some marbles in the ratio of 2 : 3 : 5. Henry gave 40% of his marbles to Fabian and Gilbert. As a result, Fabian had the same number of marbles as Gilbert and Henry had 36 fewer marbles than Fabian.

What was the percentage increase in Fabian's marbles after receiving from Henry?
How many marbles did Gilbert have at first?

4 m

Video Attempt

Ratio to units Percent of a set Percent change by More than or less than Equal stage after Internal transfer Units table Decimal units

64 P5.ST.JC.18121159

Level 3
Adam has some blue stickers and red stickers.
The number of blue stickers is increased by 20% to 60.
The number of red stickers is decreased by 30% to 70.