TIMO Khối 4 – Vòng Quốc gia (Heat Round) – Đề số 3

What is the value of the number to represent "?" in the following sequence? 2, 3, 5, 9, 17, 33, ? , 129, …

Value: Giá trị; Represent: Biểu diễn; Sequence: Dãy số.

According to the pattern shown below, how many triangle(s) is / are there from the 1st to the 500th figure counting from the left?

bên trái. ○ △ □ △ ○ △ □ △ ○…

Pattern: Quy luật; Triangles: Tam giác; Figure: Hình vẽ; Counting from the left: Tính từ phía

It requires 12 minutes to cut a piece of wood into 5 sections. If the time required to cut into each section is the same, how many minutes are required to cut into 23 sections?

Require: Cần; Sections: Phần; The same: Giống nhau.