Level 2
The number of red and blue stickers are equal.
If Adam gives away 40 red stickers and 10 blue stickers,
the ratio of red stickers to blue stickers becomes 2 : 5.
How many stickers are there at first?
Level 2
A group of children is standing in a straight line. Jane is the 5th from the left. She is also the 9th from the right. How many children are standing in the line?