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Unformatted text preview: I and II only (E) I, II, and III 51. 6587­!­item­!­187;#058&005111 Circular gears P and Q start rotating at the same time at constant speeds. Gear P makes 10 revolutions per minute, and gear Q makes 40 revolutions per minute. How many seconds after the gears start rotating will gear Q have made exactly 6 more revolutions than gear P ? (A) 6 (B) 8 (C) 10 (D) 12 (E) 15 ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ 作作作作D 作作作作 P由1由由由10由 => 60/10=6由/由 Q由1由由由40由 => 60/40=1.5由/由 由由由T由由由由Q由P由由由6由 (T/6) = (T/1.5) ­ 6 T=12 ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ 52. [?] 6641­!­item­!­187;#058&005112 In the circle above, PQ is parallel to diameter OR, and OR has length 18. What is the length of minor arc PQ ? (A) (B) (C) (D) (E) 53. 6687­!­item­!­187;#058&005122 Mary purchased 3 theater tickets with an average (arithmetic mean) price of $8. If Mary also purchases a fourth theater ticket with a price of $16, what is the average price of all 4 theater tickets? (A) $4 (B) $6 (C) $8 (D) $10 (E) $12 ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ 由由由由D 由由由由 3×8由24 (24由16)÷4由10 ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­...
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