2. 职称英语
  3. Quantity A: The two-digit integer that equals twice the sum of its digitsQuanti

Quantity A: The two-digit integer that equals twice the sum of its digitsQuanti

游客2025-02-23  24
问题 Quantity A: The two-digit integer that equals twice the sum of its digits
Quantity B: 14
选项 A、Quantity A is greater.
B、Quantity B is greater.
C、The two quantities are equal.
D、The relationship cannot be determined from the information given.
答案 A
解析 Quantity A的含义是：等于它自己数位之和的2倍的两位整数。则设Quantity A的个位数字是y，十位数字是x，得到10x+y=2(x+y)，可以将其化简为8x=y。因为z只能取1到9的整数，y只能取0到9的整数，所以，x只能取1，得出y=8。那么两位数=18，大于14。所以答案为A选项。
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