Q2.Menkara has a 4×6 index card. If she shortens the length of one side of this card by 1 inch, the card would have area 18 square inches. What would the area of the card be in square inches if instead she shortens the length of the other side by 1 inch?
Q3.Mr. Lopez has a choice of two routes to get to work. Route A is 6 miles long, and his average speed along this route is 30 miles per hour. Route B is 5 miles long, and his average speed along this route is 40 miles per hour, except for a 1/2mile stretch in a school zone where his average speed is 20 miles per hour. By how many minutes is Route B quicker than Route A?
Q4.The six-digit number??is prime for only one digit A. what is A?
使得六位數是素數的數字A只有一個。問A是幾?
(A) 1 (B) 3 (C) 5 (D) 7?(E) 9
?⏩ 解析:
Q5.Elmer the emu takes 44 equal strides to walk between consecutive telephone poles on a rural road. Oscar the ostrich can cover the same distance in 12 equal leaps. The telephone poles are evenly spaced, and the 41st pole along this road is exactly one mile (5280 feet) from the first pole. How much longer, in feet, is Oscar’s leap than Elmer’s stride?