Level 1
Adam and Bryan have a total of 1000 stickers.
Adam gives Bryan 100 stickers.
Now, they have the same number of stickers.

1. How many stickers does Adam have at first?
2. How many stickers does each have in the end?

Level 2
Adam and Bryan have a total of 1000 stickers.
Adam gives Bryan 100 stickers.
Now, Adam has 200 more than Bryan.

1. How many stickers does Adam have at first?
2. How many stickers does Bryan have in the end?

Level 2
Adam has 800 stickers.
Bryan has 200 stickers.
Bryan receives some stickers from Adam.
Now, Adam has 100 more stickers than Bryan.

1. How many stickers does Adam have in the end?
2. How many stickers does Bryan have in the end?
3. How many stickers does Adam give to Bryan?

Level 3
At first, Beaker A and Beaker B contained 0.6 ℓ and 1.6 ℓ of water respectively. Some water from Beaker B was poured into Beaker A with no water spilling over. In the end, there was as much water in Beaker A as in Beaker B. How much water was poured from Beaker B to Beaker A?

Level 2
Adam has blue and red stickers in the ratio of 1 : 2.
When 40 red stickers are replaced with the same number of blue stickers,
the ratio of the number of blue and red stickers will be 3 : 4
How many stickers are there altogether?

Level 2
Adam and Bryan have some stickers in the ratio of 1 : 2.
When Bryan gives Adam 40 stickers, the ratio of the stickers becomes 3 : 4.
How many stickers do they have all the end?

Level 3
Adam, Bryan and Chris have some stickers in the ratio of 10 : 3 : 5.
Adam gives Bryan and Chris a total of 40 stickers.
Now they have same number of stickers.

1. What is the total number of stickers that they have?
2. What is the number of stickers that Adam gives to Bryan?
3. What is the number of stickers that Adam gives to Chris?

Level 2
Archie has thrice as many buttons as Flynn. How many buttons must Archie give Flynn so that each of them has 40 buttons?

Level 3
Daniel had to solve some Science questions during a 3-week school holidays. At the end of the first week, the ratio of the number of questions solved to the number of questions unsolved was 3 : 7. At the end of the second week, Daniel solved another 36 questions and the number of unsolved questions became ¹₄ of the total number of questions. How many questions did Daniel need to solve on the third week to complete his assignment?

Level 3
Janet wanted to finish reading a 231-page book by the end of the week. On Monday she read ³₇ of the book and by Friday the ratio of the number of pages read to the total number of pages was 9 : 11. Find the number of pages Janet would need to read during the weekend in order for her to complete the entire book.