A $10 bill (1,000 cents ) was replaced with 50 coins having the same total value. The only coins used were 5-cent coins,10-cent coins. 25-cent coins,and 50-cent coins. How many 5-cent coins were used?
(1)Exactly 10 of the coins were 25-cent coins and exactly 10 of the coins were 50-cent coins.
(2)The number of 10-cent coins was twice the number of 5-cent coins.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
不要漏掉题目中提及硬币总数的条件!!
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