Problem 4.4. Along the road connecting Masha's and Sasha's houses, there are 17 apple trees and 20 poplars. When Masha was going to visit Sasha, she took photos of all the trees. Right after the tenth apple tree, Masha's phone memory ran out, and she couldn't photograph the remaining 13 trees. The next day, when Sasha was going to visit Masha, starting from the eighth apple tree, he picked one leaf from each tree. How many leaves did Sasha pick?
Answer: 24.

## 7th grade, problem 5