Đề thi Olympic Tiếng Anh lớp 4 vòng 4 năm 2013
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1. Wendell is watching the shuttle take off. When the Space Shuttle lifted off, it had moved 3 km by the time Wendell clapped his hands once. By the time he clapped twice, the Shuttle had moved 9 km. By the 3rd clap, it had moved 27 km, and by 4 claps it had moved 81 km. If this pattern continues, how many km will it move by the time Wendell claps 5 times?
2. Shirley has 18 coins to spend on a chocolate ice cream cone. One sixth of the coins are quarters, one third of the coins are dimes, and one half of the coins are nickels. How much does Shirley have to spend on ice cream?
3. Conner is reading to his little brother before bedtime. A row of 10 blocks above represents 1 book. The shaded portion is how much Conner has read so far. What decimal (fraction) of books has Conner read?
4. Ms. Calvin is playing a "Guess My Rule" game with her students. When a student says a number, she says another number, which she finds by using her rule. Based on the table above, what is Ms. Calvin's rule?
A. add 7
B. subtract 7
C. add 8
D. subtract 8
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