Last Thursday, John assembled chairs at a rate of 3 chairs per hour for part of the day and Larry assembled no chairs. Last Friday, Larry assembled chairs at a rate of 4 chairs per hour for part of the day and John assembled no chairs. If John and Larry assembled chairs for a total of 7 hours during these two days, how many chairs did John assemble last Thursday?
(1) During these two days, John and Larry assembled a total of 25 chairs.
(2) During these two days, Larry assembled more chairs than John did.
答案 A (為什麼 (1) 可以求出來,(2)沒有問題 )
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If y is an integer and y = |x | + x, is y = 0 ?
(1) x < 0
(2) y < 1
答案 D
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If a < y < z < b, is |y - a | < |y - b | ?
(1) |z - a | < |z - b |
(2) |y - a | < |z - b |
答案 D
** 絕對值出來的不是都為正數嗎? 所以用代數字的進去... 都不符,選到了E,而ETS 是 D
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