1. How many expressions are asymmetrical? ..... (choice c, answer 5)

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Two, six days before the start of school, Xiaoming winter vacation homework did nothing, while Xiao Qiang had finished 60 questions. At the beginning of school, both handed in their homework. In six days, Xiaoming did three times as much homework as Xiao Qiang, and Xiaoming did (choose D answer 15) questions every day on average.

Third, according to the regulations of chinese basketball association. Each player's number is selected between 0 and 55. When there are two digits, each digit does not exceed 5. There are (40) numbers to choose from.

4. In 19, 197, 2009, there are (choose C answer 2) prime numbers.

Five, the following four formulas.

1、0.6+0. 133 133……=0.733733……

2.0.625 = 5 out of 8

3, 14 5+2 3=2 1.

4, 3 and 7 3*4 and 5 1= 14 and 2/5.

Among them, the correct formula is (choose B answer 2, 4).

Six, a, b, c, d, e toys. A and b have fuwa. C, D and E are blessed cows. A passes C, B passes E, C passes A, D passes B, E passes D .. After five rounds. The person who takes Fuwa is (choose A, answer C, D)

Seven, a Chinese character represents a number, and different Chinese characters represent different Chinese characters.

Tuantuan * Yuanyuan = Giant Panda

Giant panda =(968)

Take any three of eight or four numbers, average them, and then add up the remaining numbers. The four numbers thus obtained are: 4, 6, 5 and 3, 1, 4 and 2/3. The original sum of four numbers is (10).

9. As shown in the figure, AB is the diameter of a semicircle. O is the central arc AC= arc CD= arc DB. M is the midpoint of arc CD, and h is the midpoint of chord CD. If n is a point on OB, the area of the semicircle is 12 square centimeter. (The area of the quadrilateral CMHN is (2) square centimeters.

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10. Among natural numbers greater than 2009, after division by 57, the quotient and the remainder are equal, and there are (2 1) such numbers.