我是数学白痴........请指教!!!
LUXIN GMAT PROBLEM SOLVING LOOSE-LEAVES
7.Which of following is greatest?
(A)9 X 0.091 (B)0.9 X 0.9 (C)4 X 0.203 (D)0.1% of 82 (E)2/3 + 5/6
A):A
8. A $10,000 savings certificate paying 1 percent simple interest per month is purchased; the certificate has a maturity date 6 months from the date of purchase. However, there is a penalty of 3 months interest if the certificate is redeemed before maturity. What is the amount of money received by the purchaser if the certificate is cashed in at 5 months?
(A)$200 (B)$600 (C)$9,800 (D)$10,200 (E)$10,600
A): D
9. The original price of an article was reduced by 25 percent. During a special sale the new price was decreased by 10 percent. By approximately what percent would the price now have to be increased in order to restore the price of the article to its original amount?
(A)32.5% (B)35% (C)48% (D)65% (E)67.5%
A):A
10.A rectangular parking space has an area of 10 square meters. IF the length and width are each increased to 3 times the original length and width, what is the area of the new parking space?
(A)16 sq m(B)19 sq m (C)30 sq m (D)60 sq m (E)90 sq m
A):E
12.At a certain bowling alley, it costs $0.50 to rent bowling shoes for the day and $1.25 to bowl 1 game. If a person has $12.80 and must rent shoes, what is the greatest number of complete games that person can bowl in one day?
(A)7 (B)8 (C)9(D)10 (E)11
A):C
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