中国银行
单选题求和式3+33+333+…+33…3(10个3)计算结果的万位数字是( )。
A.5
B.2
C.3
D.0
参考答案:D进入在线模考
【答案】D。解析:个位10个3相加,和为30,向十位进3;十位9个3相加,和为27,加上个位的进位3得30,向百位进3;百位8个3相加,和为24,加上十位的进位3得27,向千位进2;千位7个3相加,和为21,加上百位的进位2得23。向万位进2;万位6个3相加,和为18,加上千位的进位2得20,万位的数是0。所以应选择D。
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1办公室有甲、乙、丙、丁4位同志,甲比乙大5岁,丙比丁大2岁。丁三年前参加工作,当时22岁。他们四人现在的年龄之和为l27岁。那么乙现在的年龄是( )岁。
A.25
B.27
C.35
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