Đề thi Olympic Tiếng Anh lớp 4 vòng 1 năm 2013 - 2014

Samantha is having a baby! She is making the quilt above to give to her child once he or she is born. Each block of Samantha's quilt is made of 4 light triangles and 4 dark triangles, as shown above. If her quilt has 18 blocks, how many light triangles will she need?

Hector is 6 years old. His sisters are 2 and 9. His brother is 3. If Hector used the ages of the children in his family to create the smallest possible 4-digit number, what number would be in the hundreds place?