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167. If n is a positive integer, what is the tens digit of n ?
(1) The hundreds digit of 10n is 6.
(2) The tens digit of n + 1 is 7.
向來搞不太懂,n＝100a+10b+c???
(1)百位數字是六？？？
(2)十位數字是n+1=7???
請問考點？？？
171. What is the tens digit of positive integer x ?
(1) x divided by 100 has a remainder of 30.
(2) x divided by 110 has a remainder of 30.
不是要看商數是多少,加上餘數之後才能決定十位數字嘛？？？
174. Marcia’s bucket can hold a maximum of how many
liters of water?
(1) The bucket currently contains 9 liters of water.
(2) If 3 liters of water are added to the bucket when
it is half full of water, the amount of water in the
bucket will increase by 1/3
不懂解答(2)為何出現3/4？？？3/4 是怎麼解釋出來的？？？
麻煩各位了～～小妹現居國外沒人可解答！！
麻煩大家了～～～謝謝幫忙！！！ |
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发表于 2012-3-22 08:36:34
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