AMC 8 2023 Problem 25

AMC8 2023 年第 25 题

数列与规律★★★★☆

Fifteen integers

a_1, a_2, \dots, a_15

are arranged in order on a number line. The integers are equally spaced and have the property that

1 \le a_1 \le 10,\quad 13 \le a_2 \le 20,\quad \textand\quad 241 \le a_15 \le 250.

What is the sum of the digits of

a_14

?

十五个整数

a_1,a_2,\dots,a_15

依次排列在数轴上．这些整数呈等距排列，并且具有以下特性

1 \le a_1 \le 10,\quad 13 \le a_2 \le 20,\quad 241 \le a_15 \le 250.

问

a_14

的各位数字之和是多少？

A.8
B.9
C.10
D.11
E.12

正确答案 · Correct Answer

A

解析 · Solution

解析整理中

继续练习

免费刷 2023 整卷 →登录解锁诊断（看你哪儿弱）→