22. the average （arithmetic mean）number of shirts
sold per day during february was approximately what
percent greater than the average number sold during
january？
（a） 10%
（b） 20%
（c） 30%
（d） 40%
（e） 70%
questions 23-25 refer to the following graph.
23. for which two uses of electricity was the ratio of
the amounts of electricity used most nearly 3 to 1？
（a） water heater and lights/small appliances
（b） large appliances and lights/small appliances
（c） air conditioner and water heater
（d） air conditioner and lights/small appliances
（e） air conditioner and large appliances
24. the electricity used by the water heater was
measured separately and its cost per kilowatt-hour was
one-half the cost per kilowatt-hour of the rest of the
electricity used. the cost of the electricity used by the
water heater was most nearly what fraction of the total
cost of all the electricity used？
（a）
（b）
（c）
（d）
（e） it cannot be determined from the information
given.
25. in november the smythe household used the same
total amount of electricity as in july， but the water
heater used 33 percent of this total amount. by
approximately what percent did the amount of
electricity used by the water heater increase from july
to november？
（a） 13%
（b） 33%
（c） 50%
（d） 65%
（e） 130%
26. one integer will be randomly selected from the
integers 11 to 60， inclusive. what is the probability
that the selected integer will be a perfect square or a
perfect cube？
（a） 0.1
（b） 0.125
（c） 0.16
（d） 0.5
（e） 0.9
27. the measures of two angles of a parallelogram
differ by 52 degrees. the number of degrees in the
smaller angle is
（a） 38
（b） 52
（c） 64
（d） 76
（e） 128
28. the odds in favor of winning a game can be found
by computing the ratio of the probability of wining to
the probability of not winning. if the probability that
pat will win a game is ， what are the odds that pat
will win the game？
（a） 4 to 5
（b） 4 to 9
（c） 5 to 4
（d） 5 to 9
（e） 9 to 5
29. if a， b， c， and d are consecutive integers such that
a<b<c<d， then in terms of a， the sum a b d =
（a） a 4
（b） 2a 3
（c） 3a 2
（d） 3a 3
（e） 3a 4
30. 2 2 =
（a） 2
（b） 2
（c） 2
（d） 4
（e） 4