Level 2
The distance between Jeal's home and the park is 250 m. After walking a distance from his home to park, he stopped and walked back another 150 m to look for his missing notebook. He was 20 m from home. How far was he from park?
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?