three-digit

Input data between the three-digit 0-9, start running, by one per second.

定时减法计数.输入数据0到9之间三位数, 开始计时, 每秒减一.

The regular expression is changed to locate a four-digit number, followed by a dash, followed by a three-digit alphanumerical sequence.

将正则表达式修改为寻找4位数字，后面跟一个连字符，最后是3位的字符数字序列。

How many three-digit positive integers have their sum of digits divisible by 3?

有多少个三位正整数的数字之和可被3整除?

Enter 3 digit code code list , then the LED blinks three times.

按照代码表输入三位代码, LED会闪烁三次.

A combinational circuit that has three inputs that are an augend, D, an addend, E, and carry digit transferred from another digit place, F, and two outputs that are a'.

三个输入端是：被加数d、加数e以及从另一个数位传来的进位数f；两个输出端是：无进位和数t及新的进位数r。