When the integer n is divided by 6, th...

What is the units digit of (13)⁴(17)²(29)³ ？（）

A．9
B．7
C．5
D．3
E．1

If a, b, and c are integers, is the number 3 (a+b)-c divisible by 3 ？（）
(1)a+b is divisible by 3.
(2)c is divisible by 3.

A．条件(1)充分，但条件(2)不充分．
B．条件(2)充分，但条件(1)不充分．
C．条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
D．条件(1)充分，条件(2)也充分．
E．条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．

When the integer n is divided by 6, the remainder is 3. Which of the following is NOT a multiple of 6 ？（）

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3.2□△6
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